| ZIP Codes: | 14 ZIP Codes (12 Standard, 2 PO Box, 0 Unique) [See All] |
| Area Codes: | 304 / 681 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:14:23 PM |
| Population: | 24,059 [See All] |
| FIPS: | 54053 |
| Land Area: | 441 sq mi |
| Water Area: | 15 sq mi |
| Coordinates: | 38.8160, -82.0351 |
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24,059 residents live across 14 ZIPs covering 441 sq mi, served by 14 distinct USPS-recognized cities.
Population moved from 26,978 to 24,059 from 2014 to 2024 — a -10.8% change. 5 ZIPs gained residents, 9 lost.
The county's wealthiest ZIP 25287 (West Columbia, $99,458 median) and poorest ZIP 25187 (Southside, $41,944) are 17.0 miles apart — a 2.4× income gap across local geography.
Median home values vary 2.8× across this county — from $69,300 in 25503 (Ashton) to $193,900 in 25287 (West Columbia).
Density varies 97× across the county — from 12 people/sq mi in 25187 (Southside) to 1,184 in 25265 (New Haven).
Educational attainment ranges from 2.6% bachelor's+ in 25520 (Glenwood) to 26.4% in 25502 (Apple Grove) — the breadth of educational profiles across the area.
Within West Virginia, this is the #24 most populous of 55 counties and ranks #26 for median household income .
Weighted by population, the typical household earns about $54,905 across the county — reflecting what a typical resident sees, not a simple ZIP average.
16.7% of adults age 25+ hold a bachelor's degree or higher (3,016 of 18,047 reporting).
12 Standard delivery, 2 PO Box only, 0 single-entity Unique ZIPs serve this county.
Mason County lost 10.8% of residents between 2014 and 2024. ZIPs that shed the largest share:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 25550 | Point Pleasant | Standard | 8,963 | $49,497 | 50.9 | 0.2% |
| 25123 | Leon | Standard | 2,440 | $55,000 | 117.4 | -25.9% |
| 25515 | Gallipolis Ferry | Standard | 2,386 | $46,904 | 49.0 | -9.5% |
| 25253 | Letart | Standard | 2,219 | $62,756 | 50.8 | 1.7% |
| 25287 | West Columbia | Standard | 1,302 | $99,458 | 23.8 | 9.3% |
| 25260 | Mason | Standard | 1,298 | $49,167 | 2.5 | -26.0% |
| 25265 | New Haven | PO Box | 1,285 | $51,827 | 1.1 | -9.7% |
| 25520 | Glenwood | Standard | 1,129 | $51,875 | 38.5 | -13.7% |
| 25503 | Ashton | Standard | 837 | — | 17.1 | 9.0% |
| 25247 | Hartford | PO Box | 499 | $52,969 | 1.5 | -10.6% |
| 25187 | Southside | Standard | 497 | $41,944 | 40.9 | -34.2% |
| 25264 | Mount Alto | Standard | 482 | $66,150 | 8.1 | 9.8% |
| 25502 | Apple Grove | Standard | 376 | $78,079 | 23.6 | -70.7% |
| 25106 | Henderson | Standard | 346 | — | 15.6 | -21.4% |