| Official Name: | Dennis, Mississippi |
| Pushpin Map: | Mississippi#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Mississippi |
| Subdivision Type2: | County |
| Subdivision Name2: | Tishomingo |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 3.51 |
| Area Land Km2: | 3.51 |
| Area Water Km2: | 0.00 |
| Area Total Sq Mi: | 1.36 |
| Area Land Sq Mi: | 1.36 |
| Area Water Sq Mi: | 0.00 |
| Population As Of: | 2020 |
| Population Total: | 172 |
| Population Density Km2: | 48.95 |
| Population Density Sq Mi: | 126.75 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 581 |
| Coordinates: | 34.5586°N -88.2261°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 38838 |
| Area Code: | 662 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 669338 |
Dennis is a census-designated place and unincorporated community located at the intersection of Mississippi Highway 25 and Mississippi Highway 4 in Tishomingo County, Mississippi, United States. Dennis is approximately 6miles south of Tishomingo and 3miles north of Belmont.
Although an unincorporated community, Dennis has a post office.
It was first named as a CDP in the 2020 Census which listed a population of 172.[2]
| White alone (NH) | 150 | 87.21% | |
| Black or African American alone (NH) | 2 | 1.16% | |
| Native American or Alaska Native alone (NH) | 0 | 0.00% | |
| Asian alone (NH) | 0 | 0.00% | |
| Pacific Islander alone (NH) | 0 | 0.00% | |
| Some Other Race alone (NH) | 0 | 0.00% | |
| Mixed Race or Multi-Racial (NH) | 8 | 4.65% | |
| Hispanic or Latino (any race) | 12 | 6.98% | |
| Total | 172 | 100.00% |