diff --git a/src/app/features/collections/components/add-to-collection/select-project-step/select-project-step.component.html b/src/app/features/collections/components/add-to-collection/select-project-step/select-project-step.component.html
index a17d3deab..ceae12d81 100644
--- a/src/app/features/collections/components/add-to-collection/select-project-step/select-project-step.component.html
+++ b/src/app/features/collections/components/add-to-collection/select-project-step/select-project-step.component.html
@@ -26,6 +26,7 @@ <h3>{{ 'collections.addToCollection.selectProject' | translate }}</h3>
       <div class="mt-4 w-full lg:w-6">
         <osf-project-selector
           [excludeProjectIds]="excludedProjectIds()"
+          [publicOnly]="true"
           [(selectedProject)]="currentSelectedProject"
           (projectChange)="handleProjectChange($event)"
           (projectsLoaded)="handleProjectsLoaded($event)"
diff --git a/src/app/shared/components/project-selector/project-selector.component.spec.ts b/src/app/shared/components/project-selector/project-selector.component.spec.ts
index cad6e5bbe..a71d9d6bd 100644
--- a/src/app/shared/components/project-selector/project-selector.component.spec.ts
+++ b/src/app/shared/components/project-selector/project-selector.component.spec.ts
@@ -1,10 +1,11 @@
-import { provideStore } from '@ngxs/store';
+import { provideStore, Store } from '@ngxs/store';
 
 import { MockProvider } from 'ng-mocks';
 
 import { ComponentFixture, TestBed } from '@angular/core/testing';
 
 import { UserState } from '@core/store/user';
+import { ProjectModel } from '@osf/shared/models/projects/projects.model';
 import { ToastService } from '@osf/shared/services/toast.service';
 import { ProjectsState } from '@shared/stores/projects';
 
@@ -12,9 +13,13 @@ import { provideOSFCore } from '@testing/osf.testing.provider';
 
 import { ProjectSelectorComponent } from './project-selector.component';
 
+const makeProject = (id: string, isPublic: boolean): ProjectModel =>
+  ({ id, title: `Project ${id}`, isPublic }) as ProjectModel;
+
 describe('ProjectSelectorComponent', () => {
   let component: ProjectSelectorComponent;
   let fixture: ComponentFixture<ProjectSelectorComponent>;
+  let store: Store;
 
   beforeEach(() => {
     TestBed.configureTestingModule({
@@ -22,6 +27,7 @@ describe('ProjectSelectorComponent', () => {
       providers: [provideOSFCore(), MockProvider(ToastService), provideStore([ProjectsState, UserState])],
     });
 
+    store = TestBed.inject(Store);
     fixture = TestBed.createComponent(ProjectSelectorComponent);
     component = fixture.componentInstance;
     fixture.detectChanges();
@@ -51,4 +57,36 @@ describe('ProjectSelectorComponent', () => {
 
     expect(mockEvent.originalEvent.preventDefault).toHaveBeenCalled();
   });
+
+  describe('publicOnly filtering', () => {
+    const publicProject = makeProject('1', true);
+    const privateProject = makeProject('2', false);
+
+    const setProjects = (projects: ProjectModel[]) => {
+      store.reset({
+        ...store.snapshot(),
+        projects: { projects: { data: projects, isLoading: false, error: null } },
+      });
+    };
+
+    it('should show all projects when publicOnly is false', () => {
+      fixture.componentRef.setInput('publicOnly', false);
+      setProjects([publicProject, privateProject]);
+      fixture.detectChanges();
+
+      const ids = component.projectsOptions().map((o) => o.value.id);
+      expect(ids).toContain('1');
+      expect(ids).toContain('2');
+    });
+
+    it('should only show public projects when publicOnly is true', () => {
+      fixture.componentRef.setInput('publicOnly', true);
+      setProjects([publicProject, privateProject]);
+      fixture.detectChanges();
+
+      const ids = component.projectsOptions().map((o) => o.value.id);
+      expect(ids).toContain('1');
+      expect(ids).not.toContain('2');
+    });
+  });
 });
diff --git a/src/app/shared/components/project-selector/project-selector.component.ts b/src/app/shared/components/project-selector/project-selector.component.ts
index 5cd711e0f..2b7597ec8 100644
--- a/src/app/shared/components/project-selector/project-selector.component.ts
+++ b/src/app/shared/components/project-selector/project-selector.component.ts
@@ -44,6 +44,7 @@ export class ProjectSelectorComponent {
   placeholder = input<string>('common.buttons.select');
   showClear = input<boolean>(true);
   excludeProjectIds = input<string[]>([]);
+  publicOnly = input<boolean>(false);
   selectedProject = model<ProjectModel | null>(null);
 
   projectChange = output<ProjectModel | null>();
@@ -105,7 +106,9 @@ export class ProjectSelectorComponent {
       }
 
       const excludeSet = new Set(excludeIds);
-      const availableProjects = projects.filter((project) => !excludeSet.has(project.id));
+      const availableProjects = projects.filter(
+        (project) => !excludeSet.has(project.id) && (!this.publicOnly() || project.isPublic)
+      );
 
       const options = availableProjects.map((project) => ({
         label: project.title,
@@ -132,6 +135,10 @@ export class ProjectSelectorComponent {
       'filter[current_user_permissions]': 'admin',
     };
 
+    if (this.publicOnly()) {
+      params['filter[public]'] = 'true';
+    }
+
     if (filterTitle && filterTitle.trim()) {
       params['filter[title]'] = filterTitle;
     }