| Official Name: | Summit Lake, Wisconsin |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Wisconsin#USA |
| Pushpin Label: | Summit Lake |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Wisconsin |
| Subdivision Type2: | County |
| Subdivision Name2: | Langlade |
| Subdivision Type3: | Towns |
| Subdivision Name3: | Upham, Elcho |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 1.209 |
| Area Land Sq Mi: | 0.802 |
| Area Water Sq Mi: | 0.437 |
| Population As Of: | 2010 |
| Population Footnotes: | [2] |
| Population Total: | 144 |
| Population Density Sq Mi: | 179.6 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 1722 |
| Coordinates: | 45.3778°N -89.1947°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 54485 |
| Area Code: | 715 & 534 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1575061 |
| Blank1 Name: | FIPS code |
| Blank1 Info: | 55-78425 |
Summit Lake is an unincorporated community and census-designated place (CDP) in Langlade County, Wisconsin, United States. Summit Lake is located along U.S. Route 45 north of Antigo, in the towns of Upham and Elcho. Summit Lake has a post office with ZIP code 54485.[3] As of the 2010 census its population was 144.[2]
A post office called Summit Lake has been in operation since 1882.[4] The community took its name from nearby Summit Lake.[5]