| Official Name: | West Mountain, Connecticut |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Connecticut#USA |
| Pushpin Label: | West Mountain |
| Coordinates: | 41.2992°N -73.5358°W |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Name1: | Connecticut |
| Subdivision Type2: | County |
| Subdivision Name2: | Fairfield |
| Subdivision Type3: | Town |
| Subdivision Name3: | Ridgefield |
| Area Footnotes: | [1] |
| Area Total Km2: | 5.65 |
| Area Land Km2: | 5.51 |
| Area Water Km2: | 0.14 |
| Population As Of: | 2020 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 810 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 06877 (Ridgefield) |
| Area Code: | 203/475 |
| Blank Name: | FIPS code |
| Blank Info: | 09-83045 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2805973 |
West Mountain is a census-designated place (CDP) in the town of Ridgefield, Fairfield County, Connecticut, United States. It is on the west side of Ridgefield and is bordered to the west by the towns of North Salem and Lewisboro in Westchester County, New York. The West Mountain Historic District occupies at the center of the CDP,[2] and newer residences occupy portions of the remainder of the CDP.
West Mountain was first listed as a CDP prior to the 2020 census.