| ZIP Codes: | 2 ZIP Codes (2 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Code: | 660 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:12:44 PM |
| Population: | 3,254 [See All] |
| FIPS: | 29129 |
| Land Area: | 329 sq mi |
| Water Area: | 1 sq mi |
| Coordinates: | 40.4550, -93.5420 |
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3,254 residents live across 2 ZIPs covering 329 sq mi, served by 2 distinct USPS-recognized cities.
Population moved from 3,463 to 3,254 from 2014 to 2024 — a -6.0% change. 1 ZIPs gained residents, 1 lost.
The county's wealthiest ZIP 64673 (Princeton, $61,364 median) and poorest ZIP 64661 (Mercer, $54,122) are 10.1 miles apart — a 1.1× income gap across local geography.
Median home values vary 1.4× across this county — from $73,800 in 64661 (Mercer) to $101,600 in 64673 (Princeton).
Density varies 1× across the county — from 8 people/sq mi in 64661 (Mercer) to 10 in 64673 (Princeton).
Educational attainment ranges from 14.7% bachelor's+ in 64661 (Mercer) to 18.1% in 64673 (Princeton) — the breadth of educational profiles across the area.
Within Missouri, this is the #114 most populous of 116 counties and ranks #75 for median household income .
Weighted by population, the typical household earns about $59,679 across the county — reflecting what a typical resident sees, not a simple ZIP average.
17.2% of adults age 25+ hold a bachelor's degree or higher (377 of 2,187 reporting).
2 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.
Mercer County lost 6.0% of residents between 2014 and 2024. ZIPs that shed the largest share: