| Rainy River Water Aerodrome | |
| Tc: | CKQ4 |
| Type: | Public |
| Operator: | Canada Border Services Agency |
| Location: | Rainy River, Ontario |
| Timezone: | CST |
| Summer: | CDT |
| Elevation-F: | 1,062 |
| Coordinates: | 48.7167°N -128°W |
| Pushpin Map: | Canada Ontario#Canada |
| Pushpin Label: | CKQ4 |
| Pushpin Map Caption: | Location in Ontario |
| R1-Number: | n/a |
| R1-Length-F: | n/a |
| R1-Length-M: | n/a |
| R1-Surface: | Water |
| Footnotes: | Source: Water Aerodrome Supplement |
Rainy River Water Aerodrome is located on the Rainy River, Ontario, Canada.
The airport is classified as an airport of entry by Nav Canada and is staffed by the Canada Border Services Agency (CBSA). CBSA officers at this airport can handle general aviation aircraft only, with no more than 15 passengers. It shares its airspace and waterway with neighbouring Baudette International Airport in the United States.