Custer, Washington
| Custer, Washington | |
|---|---|
| Location of Custer, Washington | |
| Coordinates: 48°54′20″N 122°37′43″W / 48.90556°N 122.62861°W | |
| Country | United States | 
| State | Washington | 
| County | Whatcom | 
| Area | |
|  • Total | 1.8 sq mi (4.7 km2) | 
| • Land | 1.8 sq mi (4.7 km2) | 
| • Water | 0.0 sq mi (0.0 km2) | 
| Elevation | 39 ft (12 m) | 
| Population  (2020) | |
|  • Total | 518 | 
| • Density | 290/sq mi (110/km2) | 
| Time zone | UTC-8 (Pacific (PST)) | 
| • Summer (DST) | UTC-7 (PDT) | 
| ZIP code | 98240 | 
| Area code | 360 | 
| FIPS code | 53-16375 | 
| GNIS feature ID | 2408634 | 
Custer is a census-designated place (CDP) in Whatcom County, Washington, United States. The population was 518 at the 2020 census, up from 366 at the 2010 census.