Mercer
Source:
Illinois
Mercer is a sparsely populated county in Illinois with 11 ZIP codes, 15,528 people, and above-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, IL sits among US counties with an above-median household income, on a sparsely populated county population base, across a compact ZIP cluster.
- Top 38%
- household income vs 3,210 US counties
- 15,528
- combined ZIP population
- 11
- USPS ZIP codes covered
- $72,721
- 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 above-median household income on sparsely populated county footing (FIPS 17131, 11 ZIPs, combined population 15,528). Sort the ZIP table by population before treating the county mean as uniform.
Above-median income on a compact ZIP cluster (11 codes). Population density still swings from downtown to farm-edge; the density column is the fastest filter before a side-by-side compare. County-level HUD and FBI inputs still key off FIPS 17131.
Save two ZIPs from the table into your shortlist, then open a compare link - that is the return path a static county summary cannot replace. All figures here come from Census ACS 2023 5-Year Estimates and USPS ZCTA files.
11
Total ZIPs
15,528
Total Population
ZIP Codes in Mercer
Side-by-side: Compare 61231 vs 61281 →
Frequently Asked Questions
What is the population of Mercer?
Mercer has a total population of 15,528 across 11 ZIP codes, based on U.S. Census Bureau ACS 2023 data.
What ZIP codes are in Mercer?
Mercer includes 11 ZIP codes: 61231, 61281, 61486, 61272, 61465, 61260, 61442, 61263, 61476, 61466, and more.