Green Castle city, Missouri
Official LSAD Designation: Green Castle city • Census GEOID: 2929116
• Sullivan County
Green Castle city is an incorporated city in Sullivan County, Missouri. According to official records from the Census (2025), Green Castle city had an estimated population of 211 residents. Official Census Bureau geographic records classify this community under LSAD designation Green Castle city (GEOID 2929116).
Local Government Administration U.S. Census Bureau GMAF
City Of Greencastle
Municipal
Official Title:
Green Castle City Clerk
Address:
PO BOX 58, GREEN CASTLE MO 63544-0058
County Of Sullivan
County
Official Title:
County Clerk
Address:
109 N MAIN ST, MILAN MO 63556-1369
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 211 | 2025 |
| Median Household Income | $49,688 | 2020-2024 |
| Median Home Value | $54,600 | 2020-2024 |
| Land Area | 0.45 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).