| Official Name: | Mercer, Tennessee |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Tennessee#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Tennessee |
| Subdivision Type2: | County |
| Subdivision Name2: | Madison |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 4.51 |
| Area Land Km2: | 4.51 |
| Area Water Km2: | 0.00 |
| Area Total Sq Mi: | 1.74 |
| Area Land Sq Mi: | 1.74 |
| Area Water Sq Mi: | 0.00 |
| Population As Of: | 2020 |
| Population Footnotes: | [2] |
| Population Total: | 150 |
| Population Density Km2: | 33.26 |
| Population Density Sq Mi: | 86.16 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 351 |
| Coordinates: | 35.4792°N -89.0422°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 38392 |
| Area Code: | 731 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1293606 |
Mercer is an unincorporated community in Madison County, Tennessee, United States. It is located along State Route 138 halfway between Interstate 40 and Toone, just east of the Hatchie River.[3] Mercer has a post office; its zip code is 38392.[4]
Mercer was founded in 1888 by T. B. Mercer, for whom the community is named, at an intersection of a stagecoach road and the Tennessee Midland Railroad. Mercer erected a general store at the intersection, and it was followed in 1894 by a railroad station officially named Mercer. By the turn of the century, a lumber company and several churches had been established in the area. The community eventually had a bank and an opera house, but the former failed in 1933 and the latter burned down in the late 20th century.[5]