Steinfurter Aa

{{Short description|River in Germany}}

{{Expand German|topic=geo|date=October 2011|Steinfurter Aa}}

{{Infobox river

| name = Steinfurter Aa

| image =

| image_size =

| image_alt =

| image_caption =

| map =

| map_size =

| map_alt =

| map_caption =

| source1_location =

| mouth_location = Vechte

| mouth_coordinates = {{coord|52.2515|7.2958|type:river|display=it}}

| progression = {{RVechte}}

| subdivision_type1 = Country

| subdivision_name1 = Germany

| subdivision_type2 = State

| subdivision_name2 = North Rhine-Westphalia

| length = {{convert|46.4|km|abbr=on}} {{GeoQuelle|DE-NW|GSK3C}}

| source1_elevation =

| mouth_elevation =

| discharge1_avg =

| basin_size = {{convert|205|km2|abbr=on}} {{GeoQuelle|DE-NW|GSK3C}}

| river_system =

| tributaries_left =

| tributaries_right =

}}

Steinfurter Aa is a river of North Rhine-Westphalia, Germany. It flows through Steinfurt, and joins the Vechte near Wettringen.