Byrnes Mill city, Missouri
Official LSAD Designation: Byrnes Mill city • Census GEOID: 2910240
• Jefferson County
Byrnes Mill city is an incorporated city in Jefferson County, Missouri. According to official records from the Census (2025), Byrnes Mill city had an estimated population of 3,183 residents. Official Census Bureau geographic records classify this community under LSAD designation Byrnes Mill city (GEOID 2910240).
Local Government Administration U.S. Census Bureau GMAF
City Of Byrnes Mill
Municipal
Official Title:
City Administrator
Address:
141 OSAGE EXECUTIVE CIR, BYRNES MILL MO 63051-1383
County Of Jefferson
County
Official Title:
County Executive
Address:
PO BOX 100, HILLSBORO MO 63050-0100
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 3,183 | 2025 |
| Median Household Income | $98,576 | 2020-2024 |
| Median Home Value | $306,200 | 2020-2024 |
| Land Area | 5.16 sq mi | Gazetteer (2026) |
| Civic & Public Services | Hospitals, Libraries, Colleges | CMS / IMLS / IPEDS |
| Schools & Districts | NCES Directory Listings | Provided by k12guides.com |
| Nearby Airports | Landing Facilities | Provided by airport-data.com |
| Climate & Weather | NOAA 30-Year Normals | 1991–2020 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).