diff --git a/CHANGELOG.md b/CHANGELOG.md
index baf1c2307..855a30685 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -38,6 +38,7 @@ _Breaking developer changes, which may affect downstream projects or sites that
 # Unreleased (2.32.0-dev)
 
 #### :sparkles: Usability & Accessibility
+* Autocomplete changeset `source` tag with sources of the previous 100 changesets of the user ([#10764], thanks [@k-yle])
 * Also show search result for coordinates in `lon/lat` order in search results ([#10720], thanks [@Deeptanshu-sankhwar])
 * Allow broken (unclosed) areas to be continued ([#9635], thanks [@k-yle])
 #### :scissors: Operations
@@ -68,6 +69,7 @@ _Breaking developer changes, which may affect downstream projects or sites that
 [#10747]: https://github.com/openstreetmap/iD/issues/10747
 [#10748]: https://github.com/openstreetmap/iD/issues/10748
 [#10755]: https://github.com/openstreetmap/iD/issues/10755
+[#10764]: https://github.com/openstreetmap/iD/issues/10764
 [#10766]: https://github.com/openstreetmap/iD/pull/10766
 [@hlfan]: https://github.com/hlfan
 [@Deeptanshu-sankhwar]: https://github.com/Deeptanshu-sankhwar
diff --git a/modules/ui/changeset_editor.js b/modules/ui/changeset_editor.js
index 292136bd5..5b078d6ea 100644
--- a/modules/ui/changeset_editor.js
+++ b/modules/ui/changeset_editor.js
@@ -57,6 +57,7 @@ export function uiChangesetEditor(context) {
 
         if (initial) {
             var commentField = selection.select('.form-field-comment textarea');
+            const sourceField = _fieldsArr.find(field => field.id === 'source');
             var commentNode = commentField.node();
 
             if (commentNode) {
@@ -82,6 +83,15 @@ export function uiChangesetEditor(context) {
                         .call(commentCombo
                             .data(utilArrayUniqBy(comments, 'title'))
                         );
+
+                    // add extra dropdown options to the `source` field
+                    // based on the values used in recent changesets.
+                    const recentSources = changesets
+                        .flatMap((changeset) => changeset.tags.source?.split(';'))
+                        .filter(Boolean)
+                        .map(title => ({ title, value: title, klass: 'raw-option' }));
+
+                    sourceField.impl.setCustomOptions(utilArrayUniqBy(recentSources, 'title'));
                 });
             }
         }
diff --git a/modules/ui/fields/combo.js b/modules/ui/fields/combo.js
index caacf33a7..346d063eb 100644
--- a/modules/ui/fields/combo.js
+++ b/modules/ui/fields/combo.js
@@ -43,6 +43,7 @@ export function uiFieldCombo(field, context) {
     var _tags;
     var _countryCode;
     var _staticPlaceholder;
+    var _customOptions = [];
 
     // initialize deprecated tags array
     var _dataDeprecated = [];
@@ -181,7 +182,7 @@ export function uiFieldCombo(field, context) {
         } else {
             options = [].concat(field.options, stringsField.options).filter(Boolean);
         }
-        return options.map(function(v) {
+        const result = options.map(function(v) {
             const labelId = getLabelId(stringsField, v);
             return {
                 key: v,
@@ -191,6 +192,7 @@ export function uiFieldCombo(field, context) {
                 klass: stringsField.hasTextForStringId(labelId) ? '' : 'raw-option'
             };
         });
+        return [...result, ..._customOptions];
     }
 
 
@@ -926,6 +928,10 @@ export function uiFieldCombo(field, context) {
         );
     }
 
+    combo.setCustomOptions = (newValue) => {
+        _customOptions = newValue;
+    };
+
 
     combo.focus = function() {
         _input.node().focus();