diff --git a/scripts/startup/bl_ui/space_userpref.py b/scripts/startup/bl_ui/space_userpref.py
index 80a6cb27441..ea427e3818e 100644
--- a/scripts/startup/bl_ui/space_userpref.py
+++ b/scripts/startup/bl_ui/space_userpref.py
@@ -1581,6 +1581,7 @@ class USERPREF_PT_file_paths_asset_libraries(FilePathsPanel, Panel):
         layout.prop(active_library, "path")
         layout.prop(active_library, "import_method", text="Import Method")
         layout.prop(active_library, "use_relative_path")
+        layout.prop(active_library, "is_default")
 
 
 class USERPREF_UL_asset_libraries(UIList):
diff --git a/source/blender/editors/sculpt_paint/paint_ops.cc b/source/blender/editors/sculpt_paint/paint_ops.cc
index 04603e86959..d91f7c73899 100644
--- a/source/blender/editors/sculpt_paint/paint_ops.cc
+++ b/source/blender/editors/sculpt_paint/paint_ops.cc
@@ -1052,11 +1052,15 @@ static AssetWeakReference *brush_asset_create_weakref_hack(const bUserAssetLibra
 
 static const bUserAssetLibrary *brush_asset_get_editable_library()
 {
-  /* TODO: take into account which one is marked as default. */
-  LISTBASE_FOREACH (const bUserAssetLibrary *, asset_library, &U.asset_libraries) {
-    return asset_library;
+  if (BLI_listbase_is_empty(&U.asset_libraries)) {
+    return nullptr;
   }
-  return nullptr;
+  LISTBASE_FOREACH (const bUserAssetLibrary *, asset_library, &U.asset_libraries) {
+    if (asset_library->flag & ASSET_LIBRARY_DEFAULT) {
+      return asset_library;
+    }
+  }
+  return static_cast<const bUserAssetLibrary *>(U.asset_libraries.first);
 }
 
 static void brush_asset_refresh_editable_library(const bContext *C)
diff --git a/source/blender/makesdna/DNA_asset_types.h b/source/blender/makesdna/DNA_asset_types.h
index d3f7022cd3a..7245f635bce 100644
--- a/source/blender/makesdna/DNA_asset_types.h
+++ b/source/blender/makesdna/DNA_asset_types.h
@@ -126,6 +126,7 @@ typedef enum eAssetImportMethod {
 
 typedef enum eAssetLibrary_Flag {
   ASSET_LIBRARY_RELATIVE_PATH = (1 << 0),
+  ASSET_LIBRARY_DEFAULT = (1 << 1),
 } eAssetLibrary_Flag;
 
 /**
diff --git a/source/blender/makesrna/intern/rna_userdef.cc b/source/blender/makesrna/intern/rna_userdef.cc
index 9c5a5baf473..ba0bd22957d 100644
--- a/source/blender/makesrna/intern/rna_userdef.cc
+++ b/source/blender/makesrna/intern/rna_userdef.cc
@@ -358,6 +358,18 @@ static void rna_userdef_asset_library_path_set(PointerRNA *ptr, const char *valu
   BKE_preferences_asset_library_path_set(library, value);
 }
 
+static void rna_UserAssetLibrary_is_default_set(PointerRNA *ptr, bool value)
+{
+  bUserAssetLibrary *library = static_cast<bUserAssetLibrary *>(ptr->data);
+  if (!value) {
+    return;
+  }
+  LISTBASE_FOREACH (bUserAssetLibrary *, library_iter, &U.asset_libraries) {
+    library_iter->flag &= ~ASSET_LIBRARY_DEFAULT;
+  }
+  library->flag |= ASSET_LIBRARY_DEFAULT;
+}
+
 static void rna_userdef_extension_repo_name_set(PointerRNA *ptr, const char *value)
 {
   bUserExtensionRepo *repo = (bUserExtensionRepo *)ptr->data;
@@ -6617,6 +6629,11 @@ static void rna_def_userdef_filepaths_asset_library(BlenderRNA *brna)
   RNA_def_property_boolean_sdna(prop, nullptr, "flag", ASSET_LIBRARY_RELATIVE_PATH);
   RNA_def_property_ui_text(
       prop, "Relative Path", "Use relative path when linking assets from this asset library");
+
+  prop = RNA_def_property(srna, "is_default", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_boolean_sdna(prop, nullptr, "flag", ASSET_LIBRARY_DEFAULT);
+  RNA_def_property_boolean_funcs(prop, nullptr, "rna_UserAssetLibrary_is_default_set");
+  RNA_def_property_ui_text(prop, "Default", "Use this library for saving new assets");
 }
 
 static void rna_def_userdef_filepaths_extension_repo(BlenderRNA *brna)