diff --git a/frontend/src/components/contacts/SortPanel.tsx b/frontend/src/components/contacts/SortPanel.tsx
new file mode 100644
index 0000000..44636d4
--- /dev/null
+++ b/frontend/src/components/contacts/SortPanel.tsx
@@ -0,0 +1,428 @@
+/**
+ * SmartSuite-style Sort Panel for contacts.
+ * Multi-field sorting with priority ordering.
+ */
+
+import React, { useState, useRef, useEffect, useMemo } from 'react';
+import { ArrowDownAZ, ArrowUpZA, Plus, X } from 'lucide-react';
+import type { UnifiedContact } from '@/api/unifiedContacts';
+
+// ─── Field definitions (reuse from FilterPanel) ────────────────────────────────
+
+type FieldType = 'text' | 'number' | 'select' | 'date';
+
+interface SortFieldDef {
+  key: string;
+  label: string;
+  type: FieldType;
+  group?: 'general' | 'company' | 'person' | 'address' | 'notes' | 'meta';
+}
+
+const SORT_FIELDS: SortFieldDef[] = [
+  // General
+  { key: 'displayname', label: 'Anzeigename', type: 'text', group: 'general' },
+  { key: 'type', label: 'Typ', type: 'select', group: 'general' },
+  { key: 'email_1', label: 'E-Mail 1', type: 'text', group: 'general' },
+  { key: 'email_2', label: 'E-Mail 2', type: 'text', group: 'general' },
+  { key: 'phone_1', label: 'Telefon 1', type: 'text', group: 'general' },
+  { key: 'phone_2', label: 'Telefon 2', type: 'text', group: 'general' },
+  { key: 'website', label: 'Website', type: 'text', group: 'general' },
+  { key: 'tags', label: 'Tags', type: 'text', group: 'general' },
+
+  // Company
+  { key: 'name', label: 'Firmenname', type: 'text', group: 'company' },
+  { key: 'code', label: 'Kunden-Nr.', type: 'text', group: 'company' },
+  { key: 'accounting_code', label: 'Buchhaltungs-Code', type: 'text', group: 'company' },
+  { key: 'vat_code', label: 'USt-IdNr.', type: 'text', group: 'company' },
+  { key: 'fiscal_code', label: 'Steuernummer', type: 'text', group: 'company' },
+  { key: 'commerce_code', label: 'Handelsregister-Nr.', type: 'text', group: 'company' },
+  { key: 'bic', label: 'BIC', type: 'text', group: 'company' },
+  { key: 'bank_account', label: 'Bankkonto', type: 'text', group: 'company' },
+
+  // Person
+  { key: 'firstname', label: 'Vorname', type: 'text', group: 'person' },
+  { key: 'surname', label: 'Nachname', type: 'text', group: 'person' },
+  { key: 'suffix', label: 'Suffix', type: 'text', group: 'person' },
+  { key: 'gender', label: 'Geschlecht', type: 'select', group: 'person' },
+  { key: 'ext_name_line', label: 'Zusatzname', type: 'text', group: 'person' },
+
+  // Address
+  { key: 'mailing_street', label: 'Straße (Post)', type: 'text', group: 'address' },
+  { key: 'mailing_postalcode', label: 'PLZ (Post)', type: 'text', group: 'address' },
+  { key: 'mailing_city', label: 'Stadt (Post)', type: 'text', group: 'address' },
+  { key: 'mailing_state', label: 'Bundesland (Post)', type: 'text', group: 'address' },
+  { key: 'mailing_country', label: 'Land (Post)', type: 'text', group: 'address' },
+  { key: 'visit_city', label: 'Stadt (Besuch)', type: 'text', group: 'address' },
+  { key: 'visit_postalcode', label: 'PLZ (Besuch)', type: 'text', group: 'address' },
+  { key: 'invoice_city', label: 'Stadt (Rechnung)', type: 'text', group: 'address' },
+  { key: 'invoice_postalcode', label: 'PLZ (Rechnung)', type: 'text', group: 'address' },
+
+  // Notes
+  { key: 'projectnote', label: 'Projektnotiz', type: 'text', group: 'notes' },
+  { key: 'projectnote_title', label: 'Notiztitel', type: 'text', group: 'notes' },
+  { key: 'contact_warning', label: 'Warnung', type: 'text', group: 'notes' },
+
+  // Meta
+  { key: 'created_at', label: 'Erstellt am', type: 'date', group: 'meta' },
+  { key: 'updated_at', label: 'Geändert am', type: 'date', group: 'meta' },
+];
+
+// ─── Types ────────────────────────────────────────────────────────────────────
+
+export interface SortCondition {
+  id: string;
+  field: string;
+  order: 'asc' | 'desc';
+}
+
+export interface SortState {
+  conditions: SortCondition[];
+}
+
+export const emptySortState: SortState = {
+  conditions: [],
+};
+
+// ─── Sort logic ───────────────────────────────────────────────────────────────
+
+function getFieldValue(contact: UnifiedContact, field: string): any {
+  return (contact as any)[field];
+}
+
+function compareValues(a: any, b: any, fieldType: FieldType): number {
+  // Handle nulls/undefined — sort them last regardless of order
+  if (a == null && b == null) return 0;
+  if (a == null) return 1;
+  if (b == null) return -1;
+
+  if (fieldType === 'date') {
+    const dateA = new Date(a).getTime();
+    const dateB = new Date(b).getTime();
+    return dateA - dateB;
+  }
+
+  // Text and select — string comparison
+  const strA = String(a).toLowerCase();
+  const strB = String(b).toLowerCase();
+  if (strA < strB) return -1;
+  if (strA > strB) return 1;
+  return 0;
+}
+
+export function applySorting(contacts: UnifiedContact[], sortState: SortState): UnifiedContact[] {
+  if (!sortState.conditions.length) return contacts;
+
+  const sorted = [...contacts];
+  sorted.sort((a, b) => {
+    for (const cond of sortState.conditions) {
+      const def = SORT_FIELDS.find((f) => f.key === cond.field);
+      if (!def) continue;
+      const cmp = compareValues(getFieldValue(a, cond.field), getFieldValue(b, cond.field), def.type);
+      if (cmp !== 0) {
+        return cond.order === 'desc' ? -cmp : cmp;
+      }
+    }
+    return 0;
+  });
+  return sorted;
+}
+
+// ─── Context-sensitive field ordering ──────────────────────────────────────────
+
+function getOrderedFields(contactType?: 'company' | 'person' | undefined): SortFieldDef[] {
+  if (contactType === 'company') {
+    const order = ['general', 'company', 'address', 'notes', 'meta', 'person'];
+    return [...SORT_FIELDS].sort((a, b) => order.indexOf(a.group || 'general') - order.indexOf(b.group || 'general'));
+  }
+  if (contactType === 'person') {
+    const order = ['general', 'person', 'address', 'notes', 'meta', 'company'];
+    return [...SORT_FIELDS].sort((a, b) => order.indexOf(a.group || 'general') - order.indexOf(b.group || 'general'));
+  }
+  const order = ['general', 'company', 'person', 'address', 'notes', 'meta'];
+  return [...SORT_FIELDS].sort((a, b) => order.indexOf(a.group || 'general') - order.indexOf(b.group || 'general'));
+}
+
+// ─── Component ────────────────────────────────────────────────────────────────
+
+interface SortPanelProps {
+  sortState: SortState;
+  onSortChange: (sortState: SortState) => void;
+  contactType?: 'company' | 'person' | undefined;
+}
+
+let sortIdCounter = 0;
+function newSortId() {
+  return `sort-${Date.now()}-${++sortIdCounter}`;
+}
+
+export function SortPanel({ sortState, onSortChange, contactType }: SortPanelProps) {
+  const [open, setOpen] = useState(false);
+  const btnRef = useRef<HTMLDivElement>(null);
+  const panelRef = useRef<HTMLDivElement>(null);
+  const [panelPos, setPanelPos] = useState({ top: 0, left: 0 });
+
+  useEffect(() => {
+    if (!open) return;
+    const handler = (e: MouseEvent) => {
+      const target = e.target as Node;
+      if (btnRef.current?.contains(target) || panelRef.current?.contains(target)) return;
+      setOpen(false);
+    };
+    document.addEventListener('mousedown', handler);
+    return () => document.removeEventListener('mousedown', handler);
+  }, [open]);
+
+  const handleToggle = () => {
+    if (!open && btnRef.current) {
+      const rect = btnRef.current.getBoundingClientRect();
+      setPanelPos({ top: rect.bottom + 4, left: rect.left });
+    }
+    setOpen(!open);
+  };
+
+  const orderedFields = useMemo(() => getOrderedFields(contactType), [contactType]);
+  const activeCount = sortState.conditions.length;
+
+  const addCondition = () => {
+    onSortChange({
+      conditions: [...sortState.conditions, {
+        id: newSortId(),
+        field: orderedFields[0]?.key || 'displayname',
+        order: 'asc' as const,
+      }],
+    });
+  };
+
+  const removeCondition = (id: string) => {
+    onSortChange({
+      conditions: sortState.conditions.filter((c) => c.id !== id),
+    });
+  };
+
+  const updateCondition = (id: string, updates: Partial<SortCondition>) => {
+    onSortChange({
+      conditions: sortState.conditions.map((c) =>
+        c.id === id ? { ...c, ...updates } : c
+      ),
+    });
+  };
+
+  const clearAll = () => {
+    onSortChange({ ...emptySortState });
+  };
+
+  const moveCondition = (id: string, direction: 'up' | 'down') => {
+    const conds = [...sortState.conditions];
+    const idx = conds.findIndex((c) => c.id === id);
+    if (idx < 0) return;
+    const newIdx = direction === 'up' ? idx - 1 : idx + 1;
+    if (newIdx < 0 || newIdx >= conds.length) return;
+    [conds[idx], conds[newIdx]] = [conds[newIdx], conds[idx]];
+    onSortChange({ conditions: conds });
+  };
+
+  // Group fields for dropdown
+  const groupedFields = useMemo(() => {
+    const groups: Record<string, SortFieldDef[]> = {};
+    for (const f of orderedFields) {
+      const g = f.group || 'general';
+      if (!groups[g]) groups[g] = [];
+      groups[g].push(f);
+    }
+    return groups;
+  }, [orderedFields]);
+
+  const groupLabels: Record<string, string> = {
+    general: 'Allgemein',
+    company: 'Firma',
+    person: 'Person',
+    address: 'Adresse',
+    notes: 'Notizen',
+    meta: 'Metadaten',
+  };
+
+  return (
+    <>
+      <div ref={btnRef} className="relative flex-shrink-0">
+        <button
+          onClick={handleToggle}
+          title="Sortieren"
+          aria-label="Sortieren"
+          className={`
+            inline-flex items-center gap-1.5 px-2 py-1 rounded text-xs font-medium
+            transition-colors duration-100 cursor-pointer relative
+            ${open || activeCount > 0 ? 'bg-primary-100 text-primary-700' : 'text-secondary-600 hover:bg-secondary-100 hover:text-secondary-900'}
+          `}
+        >
+          <ArrowDownAZ className="w-3.5 h-3.5" strokeWidth={2} />
+          {activeCount > 0 && (
+            <span className="inline-flex items-center justify-center min-w-[16px] h-4 px-1 text-[10px] font-bold rounded-full bg-primary-600 text-white">
+              {activeCount}
+            </span>
+          )}
+          <svg className={`w-3 h-3 transition-transform ${open ? 'rotate-180' : ''}`} fill="none" stroke="currentColor" strokeWidth={2} viewBox="0 0 24 24">
+            <polyline points="6 9 12 15 18 9" />
+          </svg>
+        </button>
+      </div>
+
+      {open && (
+        <div
+          ref={panelRef}
+          className="fixed bg-white border border-secondary-200 rounded-lg shadow-lg"
+          style={{
+            top: panelPos.top,
+            left: panelPos.left,
+            width: '420px',
+            maxHeight: '70vh',
+            overflowY: 'auto',
+            zIndex: 3000,
+          }}
+        >
+          {/* Header */}
+          <div className="flex items-center justify-between px-4 py-3 border-b border-secondary-100">
+            <span className="text-sm font-semibold text-secondary-800">Sortieren</span>
+            <div className="flex items-center gap-2">
+              {activeCount > 0 && (
+                <button
+                  onClick={clearAll}
+                  className="text-xs text-secondary-500 hover:text-red-600 transition-colors"
+                >
+                  Alle löschen
+                </button>
+              )}
+              <button
+                onClick={() => setOpen(false)}
+                className="p-1 rounded hover:bg-secondary-100 text-secondary-400 hover:text-secondary-600"
+              >
+                <X className="w-3.5 h-3.5" />
+              </button>
+            </div>
+          </div>
+
+          {/* Info text */}
+          {activeCount === 0 && (
+            <div className="px-4 py-3 border-b border-secondary-100">
+              <div className="text-center py-4 text-xs text-secondary-400">
+                Keine Sortierung aktiv. Datensätze können per Drag-and-Drop umsortiert werden.
+              </div>
+            </div>
+          )}
+
+          {/* Active sort badges */}
+          {activeCount > 0 && (
+            <div className="flex flex-wrap gap-1.5 px-4 py-2 border-b border-secondary-100">
+              {sortState.conditions.map((cond, idx) => {
+                const def = SORT_FIELDS.find((f) => f.key === cond.field);
+                return (
+                  <span
+                    key={cond.id}
+                    className="inline-flex items-center gap-1 px-2 py-0.5 text-[11px] rounded-full bg-primary-50 text-primary-700 border border-primary-200"
+                  >
+                    <span className="font-bold text-primary-500">{idx + 1}.</span>
+                    {def?.label}
+                    {cond.order === 'asc' ? <ArrowDownAZ className="w-3 h-3" /> : <ArrowUpZA className="w-3 h-3" />}
+                    <button onClick={() => removeCondition(cond.id)} className="hover:text-red-600">
+                      <X className="w-3 h-3" />
+                    </button>
+                  </span>
+                );
+              })}
+            </div>
+          )}
+
+          {/* Sort rows */}
+          <div className="px-4 py-3 space-y-2">
+            {sortState.conditions.map((cond, idx) => {
+              const def = SORT_FIELDS.find((f) => f.key === cond.field);
+              return (
+                <div key={cond.id} className="flex items-center gap-1.5">
+                  {/* Priority number + reorder */}
+                  <div className="flex flex-col items-center w-6 flex-shrink-0">
+                    <span className="text-[10px] font-bold text-primary-600">{idx + 1}</span>
+                    <div className="flex flex-col">
+                      <button
+                        onClick={() => moveCondition(cond.id, 'up')}
+                        disabled={idx === 0}
+                        className="text-secondary-300 hover:text-secondary-600 disabled:opacity-30 leading-none"
+                      >
+                        <svg className="w-3 h-3" fill="none" stroke="currentColor" strokeWidth={2.5} viewBox="0 0 24 24">
+                          <polyline points="18 15 12 9 6 15" />
+                        </svg>
+                      </button>
+                      <button
+                        onClick={() => moveCondition(cond.id, 'down')}
+                        disabled={idx === sortState.conditions.length - 1}
+                        className="text-secondary-300 hover:text-secondary-600 disabled:opacity-30 leading-none"
+                      >
+                        <svg className="w-3 h-3" fill="none" stroke="currentColor" strokeWidth={2.5} viewBox="0 0 24 24">
+                          <polyline points="6 9 12 15 18 9" />
+                        </svg>
+                      </button>
+                    </div>
+                  </div>
+
+                  {/* Field dropdown */}
+                  <select
+                    value={cond.field}
+                    onChange={(e) => updateCondition(cond.id, { field: e.target.value })}
+                    className="flex-1 min-w-0 px-2 py-1.5 text-xs border border-secondary-200 rounded bg-white cursor-pointer focus:outline-none focus:border-primary-400"
+                  >
+                    {Object.entries(groupedFields).map(([group, fields]) => (
+                      <optgroup key={group} label={groupLabels[group] || group}>
+                        {fields.map((f) => (
+                          <option key={f.key} value={f.key}>{f.label}</option>
+                        ))}
+                      </optgroup>
+                    ))}
+                  </select>
+
+                  {/* Order toggle */}
+                  <button
+                    onClick={() => updateCondition(cond.id, { order: cond.order === 'asc' ? 'desc' : 'asc' })}
+                    className="
+                      inline-flex items-center gap-1 px-2 py-1.5 text-xs border border-secondary-200 rounded
+                      bg-white cursor-pointer hover:bg-secondary-50 transition-colors flex-shrink-0
+                    "
+                    title={cond.order === 'asc' ? 'Aufsteigend' : 'Absteigend'}
+                  >
+                    {cond.order === 'asc'
+                      ? <ArrowDownAZ className="w-3.5 h-3.5" strokeWidth={2} />
+                      : <ArrowUpZA className="w-3.5 h-3.5" strokeWidth={2} />
+                    }
+                    <span className="text-[10px]">{cond.order === 'asc' ? 'A→Z' : 'Z→A'}</span>
+                  </button>
+
+                  {/* Remove button */}
+                  <button
+                    onClick={() => removeCondition(cond.id)}
+                    className="p-1 rounded hover:bg-red-50 text-secondary-400 hover:text-red-600 transition-colors flex-shrink-0"
+                  >
+                    <X className="w-3.5 h-3.5" />
+                  </button>
+                </div>
+              );
+            })}
+          </div>
+
+          {/* Footer */}
+          <div className="flex items-center justify-between px-4 py-3 border-t border-secondary-100">
+            <button
+              onClick={addCondition}
+              className="inline-flex items-center gap-1 px-2 py-1 text-xs font-medium text-primary-600 hover:bg-primary-50 rounded transition-colors"
+            >
+              <Plus className="w-3.5 h-3.5" />
+              Sortierung hinzufügen
+            </button>
+            <button
+              onClick={() => setOpen(false)}
+              className="px-3 py-1 text-xs font-medium text-white bg-primary-600 hover:bg-primary-700 rounded transition-colors"
+            >
+              Fertig
+            </button>
+          </div>
+        </div>
+      )}
+    </>
+  );
+}
diff --git a/frontend/src/pages/ContactsList.tsx b/frontend/src/pages/ContactsList.tsx
index e9d892f..c6aa0ca 100644
--- a/frontend/src/pages/ContactsList.tsx
+++ b/frontend/src/pages/ContactsList.tsx
@@ -21,6 +21,7 @@ import { TagSelector } from '@/components/tags/TagSelector';
 import type { Tag } from '@/api/tags';
 import { ArrowDownAZ, ArrowUpZA, Bookmark, ChevronLeft, ExternalLink, LayoutGrid, List, Plus, Printer, Table2 } from 'lucide-react';
 import { FilterPanel, applyFilters, emptyFilterState, type FilterState } from '@/components/contacts/FilterPanel';
+import { SortPanel, applySorting, emptySortState, type SortState } from '@/components/contacts/SortPanel';
 import {
   useUnifiedContacts,
   useUnifiedContact,
@@ -44,6 +45,7 @@ export function ContactsListPage() {
   const [savedFiltersOpen, setSavedFiltersOpen] = useState(false);
   const [selectedTags, setSelectedTags] = useState<Tag[]>([]);
   const [filterState, setFilterState] = useState<FilterState>(emptyFilterState);
+  const [sortState, setSortState] = useState<SortState>(emptySortState);
   const openWindow = useWindowStore((s) => s.openWindow);
 
   // Debounce search
@@ -113,8 +115,10 @@ export function ContactsListPage() {
     }
     // Apply FilterPanel conditions
     result = applyFilters(result, filterState);
+    // Apply SortPanel sorting
+    result = applySorting(result, sortState);
     return result;
-  }, [contacts, tagFilter, filterState]);
+  }, [contacts, tagFilter, filterState, sortState]);
 
   // Handle folder selection
   const handleSelectFilter = useCallback((filter: ContactFilter) => {
@@ -232,26 +236,20 @@ export function ContactsListPage() {
         ),
         onClick: () => {},
       },
-      // Sort dropdown
+      // SortPanel — SmartSuite-style multi-field sort
       {
-        id: 'sort-by',
+        id: 'sort-panel',
         plugin: 'contacts',
-        label: t('common.sort', 'Sortieren'),
-        type: 'dropdown' as const,
+        label: 'Sortieren',
+        type: 'custom' as const,
         group: 'sort',
-        icon: <ArrowDownAZ className="w-3.5 h-3.5" strokeWidth={2} />,
-        menuWidth: '200px',
-        menuOptions: [
-          ...sortOptions.map((opt) => ({
-            value: `sort-${opt.value}`, label: opt.label, section: t('common.sortBy', 'Sortieren nach'),
-            active: sortBy === opt.value, onClick: () => { setSortBy(opt.value); setPage(1); },
-          })),
-          { value: 'sep-order', label: '', separator: true, onClick: () => {} },
-          { value: 'sort-asc', label: t('common.sortAsc', 'Aufsteigend'), section: t('common.sortOrder', 'Reihenfolge'),
-            icon: <ArrowDownAZ className="w-3.5 h-3.5" strokeWidth={2} />, active: sortOrder === 'asc', onClick: () => handleSortChange(sortBy, 'asc') },
-          { value: 'sort-desc', label: t('common.sortDesc', 'Absteigend'),
-            icon: <ArrowUpZA className="w-3.5 h-3.5" strokeWidth={2} />, active: sortOrder === 'desc', onClick: () => handleSortChange(sortBy, 'desc') },
-        ],
+        customComponent: (
+          <SortPanel
+            sortState={sortState}
+            onSortChange={setSortState}
+            contactType={contactType}
+          />
+        ),
         onClick: () => {},
       },
       // View mode dropdown (list / table / cards)
@@ -313,7 +311,7 @@ export function ContactsListPage() {
     ];
     registerItems('contacts', items);
     return () => unregisterPlugin('contacts');
-  }, [handleSearch, handleCreate, handleSelectFilter, handleSortChange, t, registerItems, unregisterPlugin, sortBy, sortOrder, selectedFilter, viewMode, sortOptions, viewModeOptions, filterState, contactType]);
+  }, [handleSearch, handleCreate, handleSelectFilter, t, registerItems, unregisterPlugin, selectedFilter, viewMode, sortOptions, viewModeOptions, filterState, contactType, sortState]);
 
   return (
     <div className="flex flex-col h-full" data-testid="contacts-list-page">