Seine River 23B

{{Use Canadian English|date=January 2023}}

{{Infobox settlement

| name = Seine River 23B

| official_name = Seine River Indian Reserve No. 23B

| native_name =

| settlement_type = Indian reserve

| image_skyline =

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| image_map =

| map_caption =

| pushpin_map = Canada Ontario

| pushpin_label_position =

| pushpin_mapsize = 200

| coordinates = {{coord|48|40|N|92|46|W|region:CA-ON|display=inline,title}}

| subdivision_type = Country

| subdivision_name = {{CAN}}

| subdivision_type1 = Province

| subdivision_name1 = {{ON}}

| subdivision_type2 = District

| subdivision_name2 = Rainy River

| subdivision_type3 = First Nation

| subdivision_name3 = Seine River

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| area_footnotes =

| area_total_km2 =

| area_land_km2 = 10.26

| area_water_km2 =

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| elevation_m =

| population_footnotes = {{cite web |url=https://www12.statcan.gc.ca/census-recensement/2021/dp-pd/prof/details/page.cfm?Lang=E&SearchText=Seine%20River%2023B&DGUIDlist=2016A00053559065&GENDERlist=1,2,3&STATISTIClist=1,4&HEADERlist=0 |title=Seine River 23B census profile |publisher=Statistics Canada |work=2021 Census of Population |date=9 February 2022 |accessdate=5 May 2024}}

| population_total = 0

| population_as_of = 2021

| population_density_km2 = 0

| website = [http://seineriverfirstnation.ca/ seineriverfirstnation.ca]

| footnotes =

}}

Seine River 23B is a First Nations reserve in northwestern Ontario, Canada. It is one of three reserves of the Seine River First Nation.