| Official Name: | Mars Hill, Maine |
| Settlement Type: | Census-designated place |
| Motto: | MAYOR = Adeline Parker VICE MAYOR= Janelle Rooney |
| Pushpin Label: | Mars Hill |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location within the state of Maine |
| Mapsize: | 250px |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Maine |
| Subdivision Type2: | County |
| Subdivision Name2: | Aroostook |
| Subdivision Type3: | Town |
| Subdivision Name3: | Mars Hill |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 5.60 |
| Area Land Km2: | 5.51 |
| Area Water Km2: | 0.08 |
| Area Total Sq Mi: | 2.16 |
| Area Land Sq Mi: | 2.13 |
| Area Water Sq Mi: | 0.03 |
| Population As Of: | 2020 |
| Population Total: | 818 |
| Population Density Km2: | 148.36 |
| Population Density Sq Mi: | 384.22 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 420 |
| Coordinates: | 46.5158°N -67.8667°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 04758 |
| Area Code: | 207 |
| Blank Name: | FIPS code |
| Blank Info: | 23-43675 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2583562 |
Mars Hill is a census-designated place (CDP) comprising the main village within the town of Mars Hill in Aroostook County, Maine, United States. The population of the CDP was 980 at the 2010 census,[2] out of a population of 1,493 for the entire town. Prior to 2010, the village was part of the Mars Hill-Blaine CDP.
The Mars Hill CDP is located near the southwestern corner of the town of Mars Hill, bordered by the town and CDP of Blaine to the south. U.S. Route 1 runs through the center of the CDP, leading northwest to Presque Isle and south to Houlton. U.S. Route 1A meets Route 1 at the center of the CDP and leads north to Fort Fairfield, eventually rejoining Route 1 in Van Buren.
According to the United States Census Bureau, the Mars Hill CDP has a total area of 5.6sqkm, of which 5.5sqkm is land and 0.1sqkm, or 1.48%, is water.[2]