| Official Name: | Lake Chaffee, Connecticut |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Connecticut#USA |
| Pushpin Label: | Lake Chaffee |
| Coordinates: | 41.9386°N -72.1958°W |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Name1: | Connecticut |
| Subdivision Type2: | County |
| Subdivision Name2: | Windham |
| Subdivision Type3: | Town |
| Subdivision Name3: | Ashford |
| Area Footnotes: | [1] |
| Area Total Km2: | 0.55 |
| Area Land Km2: | 0.34 |
| Area Water Km2: | 0.21 |
| Population As Of: | 2020 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 856 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 06278 (Ashford) |
| Area Code: | 860/959 |
| Blank Name: | FIPS code |
| Blank Info: | 09-41238 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2805991 |
Lake Chaffee is a census-designated place (CDP) in the northwestern part of the town of Ashford, Windham County, Connecticut, United States. It is a residential community surrounding Lake Chaffee, a small water body formed in the early 20th century by damming an area of wetlands. Connecticut Route 89 (Ference Road) forms the eastern edge of the CDP, leading north to Interstate 84 and south 6miles to U.S. Route 44 at Warrenville.
Lake Chaffee was first listed as a CDP prior to the 2020 census.