Index: source/blender/editors/mesh/editmesh_select.c
===================================================================
--- source/blender/editors/mesh/editmesh_select.c	(revision 53424)
+++ source/blender/editors/mesh/editmesh_select.c	(working copy)
@@ -63,8 +63,10 @@
 #include "DNA_scene_types.h"
 #include "DNA_object_types.h"
 #include "DNA_mesh_types.h"
+#include "DNA_meshdata_types.h"
 
 #include "mesh_intern.h"
+#include "BKE_deform.h"
 
 #include "UI_resources.h"
 
@@ -3225,3 +3227,91 @@
 	
 	RNA_def_boolean(ot->srna, "select_bigger", 0, "Select Bigger", "Select bigger regions instead of smaller ones");
 }
+
+static int edbm_select_vert_group_count_exec(bContext *C, wmOperator *op)
+{
+	Object *obedit = CTX_data_edit_object(C);
+	BMEditMesh *em = BMEdit_FromObject(obedit);
+	BMVert *eve;
+	BMEdge *eed;
+	BMFace *efa;
+	BMIter iter;
+
+    bDeformGroup *group = obedit->defbase.first;
+
+    const int compare = RNA_enum_get(op->ptr, "compare");
+
+    int defcount = 0; //total number of vertex groups on the object
+    int vertdefcount = 0; //number of vertex groups current vert is assigned to
+    int targetcount = RNA_int_get(op->ptr, "count"); //target value we are comparing vertices against
+    int i = 0; //for loop iteration
+
+    while(group)//calculate the number of vertex groups. Is there a variable that stores this information somewhere?
+    {
+        group = group->next;
+        defcount++;
+    }
+
+	if (!RNA_boolean_get(op->ptr, "extend"))
+		EDBM_flag_disable_all(em, BM_ELEM_SELECT);
+
+    BM_ITER_MESH (eve, &iter, em->bm, BM_VERTS_OF_MESH) {
+        if (!BM_elem_flag_test(eve, BM_ELEM_HIDDEN)) {
+
+            MDeformVert *dv = CustomData_bmesh_get(&em->bm->vdata, eve->head.data, CD_MDEFORMVERT);
+            vertdefcount = 0;
+
+
+            for(i=0; i<defcount; i++){
+                if (defvert_find_index(dv, i)) {
+                    vertdefcount ++;
+                }
+            }
+
+            if(compare == SIM_CMP_EQ){
+                if(vertdefcount == targetcount){
+                    BM_vert_select_set(em->bm, eve, select);
+                }
+            }
+            else if(compare == SIM_CMP_GT){
+                if(vertdefcount > targetcount){
+                    BM_vert_select_set(em->bm, eve, select);
+                }
+            }
+            else if(compare == SIM_CMP_LT){
+                if(vertdefcount < targetcount){
+                    BM_vert_select_set(em->bm, eve, select);
+                }
+            }
+
+        }
+    }
+
+	EDBM_selectmode_flush(em);
+
+	WM_event_add_notifier(C, NC_GEOM | ND_SELECT, obedit->data);
+
+	return OPERATOR_FINISHED;
+}
+
+void MESH_OT_select_vert_group_count(wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name = "Select Verts Group Count";
+	ot->description = "Selects vertices by number of vertex groups";
+	ot->idname = "MESH_OT_select_vert_group_count";
+
+	/* api callbacks */
+	ot->exec = edbm_select_vert_group_count_exec;
+	ot->poll = ED_operator_editmesh;
+
+	/* flags */
+	ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
+
+    RNA_def_enum(ot->srna, "compare", prop_similar_compare_types, SIM_CMP_EQ, "Compare", "");
+
+    RNA_def_int(ot->srna, "count", 0, 0, INT_MAX,
+	                "Group Count", "Number of vertex groups to compare", 0, 100);
+	RNA_def_boolean(ot->srna, "extend", 0,
+	                "Extend Selection", "Extend selection instead of deselecting everything first");
+}
Index: source/blender/editors/mesh/mesh_ops.c
===================================================================
--- source/blender/editors/mesh/mesh_ops.c	(revision 53424)
+++ source/blender/editors/mesh/mesh_ops.c	(working copy)
@@ -160,6 +160,8 @@
 	WM_operatortype_append(MESH_OT_wireframe);
 	WM_operatortype_append(MESH_OT_edge_split);
 
+    WM_operatortype_append(MESH_OT_select_vert_group_count);
+
 #ifdef WITH_BULLET
 	WM_operatortype_append(MESH_OT_convex_hull);
 #endif
Index: source/blender/editors/mesh/mesh_intern.h
===================================================================
--- source/blender/editors/mesh/mesh_intern.h	(revision 53424)
+++ source/blender/editors/mesh/mesh_intern.h	(working copy)
@@ -138,6 +138,7 @@
 void MESH_OT_solidify(struct wmOperatorType *ot);
 void MESH_OT_select_nth(struct wmOperatorType *ot);
 void MESH_OT_select_next_loop(struct wmOperatorType *ot);
+void MESH_OT_select_vert_group_count(wmOperatorType *ot);
 
 extern struct EnumPropertyItem *corner_type_items;