| ZIP Codes: | 3 ZIP Codes (3 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Codes: | 235 / 573 / 618 / 730 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:12:46 PM |
| Population: | 15,080 [See All] |
| FIPS: | 29186 |
| Land Area: | 417 sq mi |
| Water Area: | 9 sq mi |
| Coordinates: | 37.9669, -90.2298 |
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17,420 residents live across 3 ZIPs covering 417 sq mi, served by 3 distinct USPS-recognized cities.
Population moved from 15,805 to 17,420 from 2014 to 2024 — a +10.2% change. 3 ZIPs gained residents, 0 lost.
The county's wealthiest ZIP 63627 (Bloomsdale, $88,071 median) and poorest ZIP 63670 (Sainte Genevieve, $62,679) are 10.0 miles apart — a 1.4× income gap across local geography.
Median home values vary 1.3× across this county — from $212,500 in 63670 (Sainte Genevieve) to $266,700 in 63627 (Bloomsdale).
Density varies 2× across the county — from 26 people/sq mi in 63673 (Saint Mary) to 48 in 63670 (Sainte Genevieve).
Educational attainment ranges from 14.0% bachelor's+ in 63627 (Bloomsdale) to 19.7% in 63673 (Saint Mary) — the breadth of educational profiles across the area.
Within Missouri, this is the #65 most populous of 116 counties and ranks #18 for median household income with the #12 fastest decade growth .
Weighted by population, the typical household earns about $68,790 across the county — reflecting what a typical resident sees, not a simple ZIP average.
16.5% of adults age 25+ hold a bachelor's degree or higher (2,024 of 12,245 reporting).
3 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.