Red Flag Lake (Zhenning County)

{{no footnotes|date=March 2024}}

{{Infobox body of water

| name = Red Flag Lake

| other_name = Red Flag Reservoir

| native_name ={{native name|zh|红旗湖}}

| image =

| caption =

| image_bathymetry =

| pushpin_map = China

| pushpin_map_caption= Location in China.

| alt_bathymetry =

| caption_bathymetry =

| location = Zhenning Buyei and Miao Autonomous County, Guizhou, China

| coords = {{coord|26.080191|105.776436|format=dms|type:waterbody_region:CN|display =inline,title}}

| type = Artificial lake

| inflow =

| outflow = Zhenning River

| catchment =

| basin_countries = China

| date-built =

| date-flooded =

| agency =

| length =

| width =

| area = {{convert|5|km2|acre}}

| depth =

| max-depth = {{convert|10.8|m|ft|abbr=on}}

| volume = {{convert|832600|m3|cumi|abbr=on}}

| residence_time =

| shore =

| elevation =

| frozen =

| islands =

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}}

Red Flag Lake ({{zh|s=红旗湖|t=紅旗湖|p=Hóngqí Hú}}), also known as Red Flag Reservoir ({{zh|s=红旗水库|t=紅旗水庫|p=Hóngqí Shuǐkù|labels=no}}), is an artificial lake in Zhenning Buyei and Miao Autonomous County, Guizhou, China. It covers a total surface area of {{convert|5|km2|sqmi|abbr=on}} and has a storage capacity of some {{convert|832600|m3|cumi|abbr=on}} of water. The lake discharges into the Zhenning River.