Mercer
Source:
Kentucky
Mercer is a sparsely populated county in Kentucky with 3 ZIP codes, 21,988 people, and below-median household income among US counties. All data is sourced from the U.S. Census Bureau American Community Survey (ACS) 2023 5-Year Estimates.
National county placement
According to ACS 5-Year Estimates, Mercer, KY sits among US counties with a below-median household income, on a sparsely populated county population base, across a handful of delivery areas.
- 43rd pct
- household income vs 3,210 US counties
- 21,988
- combined ZIP population
- 3
- USPS ZIP codes covered
- $64,891
- avg ZIP median income
Income percentile ranks this county's average ZIP median household income against 3,210 US counties with ACS income on at least one ZIP.
Mercer lands in the national county income distribution as below-median household income on sparsely populated county footing (FIPS 21167, 3 ZIPs, combined population 21,988). On this short ZIP list the county page is mainly the FIPS bridge - household ACS fields live on the primary ZIP.
Below-median income with few ZIPs: start cost-of-living reads on the primary code (40330), not the county mean. This page exists to join FIPS 21167 to HUD/FBI tables once the ZIP is chosen.
Population sits in the five-to-twenty-five thousand band with few ZIPs - still ZIP-first for household fields, but the county seat ZIP (usually the densest row) is worth a second glance before the FIPS overlays.
Within Kentucky, Madison is the closest lower-income county and Christian the closest higher-income county by average ZIP household income. Their 4 and 9 ZIP footprints are the immediate statewide comparison set for Mercer. Use those locations as statewide context before treating the county average as a local-market answer.
3
Total ZIPs
21,988
Total Population
ZIP Codes in Mercer
Side-by-side: Compare 40330 vs 40372 →
Frequently Asked Questions
What is the population of Mercer?
Mercer has a total population of 21,988 across 3 ZIP codes, based on U.S. Census Bureau ACS 2023 data.
What ZIP codes are in Mercer?
Mercer includes 3 ZIP codes: 40330, 40372, 40310.