| St. Thomas Municipal Airport | |
| Faa: | 4S5 |
| Type: | Public |
| Owner: | St. Thomas Airport Authority |
| City-Served: | St. Thomas, North Dakota |
| Elevation-F: | 839 |
| Coordinates: | 48.6264°N -97.4392°W |
| Pushpin Map: | USA North Dakota#USA |
| Pushpin Relief: | yes |
| Pushpin Map Caption: | Location of airport in North Dakota |
| Pushpin Label: | 4S5 |
| Pushpin Label Position: | left |
| R1-Number: | 17/35 |
| R1-Length-F: | 2,600 |
| R1-Surface: | Asphalt |
| Stat-Year: | 2022 |
| Stat1-Header: | Aircraft operations (year ending 9/28/2022) |
| Stat1-Data: | 2,100 |
| Stat2-Header: | Based aircraft |
| Stat2-Data: | 3 |
| Footnotes: | Source: Federal Aviation Administration[1] |
St. Thomas Municipal Airport is a public use airport located one nautical mile (2 km) northeast of the central business district of St. Thomas, a city in Pembina County, North Dakota, United States. It is owned by the St. Thomas Airport Authority.
St. Thomas Municipal Airport covers an area of 50 acres (20 ha) at an elevation of 839 feet (256 m) above mean sea level. It has one runway designated 17/35 with an asphalt surface measuring 2,600 by 50 feet (792 x 15 m).
For the 12-month period ending September 28, 2022, the airport had 2,100 aircraft operations, an average of 40 per week: all general aviation. At that time there were 3 single-engine aircraft based at this airport.