diff --git a/app/components/multiselect_combobox_component.html.erb b/app/components/multiselect_combobox_component.html.erb
index 969cd980e..26762f5d3 100644
--- a/app/components/multiselect_combobox_component.html.erb
+++ b/app/components/multiselect_combobox_component.html.erb
@@ -14,7 +14,7 @@
         <% end %>
         <% if @field_name == 'advanced_location_s' %>
             <%= content_tag :li,
-                'pul',
+                'All Princeton Holdings',
                 class: 'dropdown-item',
                 tabindex: -1,
                 role: 'option' %>
@@ -32,7 +32,7 @@
         <% end %>
         <% if @field_name == 'advanced_location_s' %>
             <%= content_tag :option,
-                'pul',
+                'All Princeton Holdings',
                 value: 'pul',
                 selected: params.dig('f_inclusive', 'advanced_location_s', 0) == 'pul' %>
         <% end %>
diff --git a/app/javascript/orangelight/multiselect_combobox.es6 b/app/javascript/orangelight/multiselect_combobox.es6
index ba3a6650e..a18839a21 100644
--- a/app/javascript/orangelight/multiselect_combobox.es6
+++ b/app/javascript/orangelight/multiselect_combobox.es6
@@ -17,6 +17,7 @@ export default class MultiselectCombobox {
       .querySelector('.number-of-results');
     this.#addEventListeners();
     this.#applySelections();
+    this.#orderList();
   }
 
   toggleItem(item) {
@@ -130,15 +131,40 @@ export default class MultiselectCombobox {
   }
 
   #compare(a, b) {
+    const locations = [
+      'All Princeton Holdings',
+      'Architecture Library',
+      'East Asian Library',
+      'Engineering Library',
+      'Firestone Library',
+      'Forrestal Annex',
+      'Harold P. Furth Plasma Physics Library',
+      'Lewis Library',
+      'Marquand Library',
+      'Mendel Music Library',
+      'Mudd Manuscript Library',
+      'ReCAP',
+      'Special Collections',
+      'Stokes Library',
+    ];
+
     function toBoolean(value) {
       return value === 'true' ? true : false;
     }
 
+    function inLocations(value) {
+      let i = value.indexOf('  (');
+      let clean = value.slice(0, i === -1 ? value.length : i);
+      return locations.includes(clean);
+    }
+
     if (
       toBoolean(a.getAttribute('aria-selected')) !==
       toBoolean(b.getAttribute('aria-selected'))
     ) {
       return toBoolean(a.getAttribute('aria-selected')) ? -1 : 1;
+    } else if (inLocations(a.textContent) !== inLocations(b.textContent)) {
+      return inLocations(a.textContent) ? -1 : 1;
     } else {
       return a.textContent.localeCompare(b.textContent);
     }
diff --git a/spec/javascript/orangelight/multiselect_combobox.spec.js b/spec/javascript/orangelight/multiselect_combobox.spec.js
index 8d6cd868c..9f3d60f2b 100644
--- a/spec/javascript/orangelight/multiselect_combobox.spec.js
+++ b/spec/javascript/orangelight/multiselect_combobox.spec.js
@@ -111,22 +111,33 @@ describe('MultiselectCombobox', () => {
   describe('when one of the options is already selected', () => {
     beforeEach(() => {
       document.body.innerHTML = `
-                <div class="dropdown">
-                    <label for="my-id">My field</label>
-                    <input id="my-id">
-                    <ul>
-                        <li>Firestone</li>
-                        <li>Lewis</li>
-                    </ul>
-                    <select multiple="true" class="selectpicker">
-                        <option value="Firestone">Firestone</option>
-                        <option value="Lewis" selected>Lewis</option>
-                    </select>
-                </div>`;
+        <div class="dropdown">
+          <label for="my-id">My field</label>
+          <input id="my-id">
+          <ul>
+            <li>All Princeton Holdings</li>
+            <li>Firestone Library  (8)</li>
+            <li>Lewis Library  (22)</li>
+            <li>annex$fst: Forrestal Annex - A  (1)</li>
+          </ul>
+          <select multiple="true" class="selectpicker">
+            <option value="pul">All Princeton Holdings</option>
+            <option value="Firestone Library">Firestone Library  (8)</option>
+            <option value="Lewis Library" selected>Lewis Library  (22)</option>
+            <option value="annex$fst" selected>annex$fst: Forrestal Annex - A  (1)</option>
+          </select>
+        </div>`;
       combobox = new MultiselectCombobox(document.querySelector('input'));
     });
     it('Moves the active option to the top', () => {
-      expect(document.querySelectorAll('li')[0].textContent).toEqual('Lewis');
+      expect(document.querySelectorAll('li')[0].textContent).toEqual(
+        'Lewis Library  (22)'
+      );
+    });
+    it('Keeps the libraries sorted before other locations', () => {
+      expect(document.querySelectorAll('li')[1].textContent).toEqual(
+        'annex$fst: Forrestal Annex - A  (1)'
+      );
     });
     it('Adds a checkmark icon to the <li>', () => {
       expect(
@@ -144,7 +155,9 @@ describe('MultiselectCombobox', () => {
       ).toEqual('true');
     });
     it('Adds the text to the <input>', () => {
-      expect(document.querySelector('input').value).toEqual('Lewis');
+      expect(document.querySelector('input').value).toEqual(
+        'Lewis Library  (22); annex$fst: Forrestal Annex - A  (1)'
+      );
     });
   });
 });