Mercer County, Pennsylvania demographics
Mercer County, Pennsylvania (county FIPS 42085) has a median household income of $59,976 (±$1,687) and a total population of 109,257 in the American Community Survey 5-year estimates for 2020-2024.
Margins of error are at the 90% confidence level. The figures describe 2020-2024 (dollars in 2024 dollars), not the present. 28 ZIP Code Tabulation Areas overlap the county (Census 2020).
Data as of Oct 22, 2026 (Olympus publication) · Markdown version
- Values are ACS 5-year estimates for 2020-2024 (dollars in 2024 dollars), not current figures.
- ZCTA-county overlaps come from the Census 2020 relationship file and use 2020 counties, by land area; Connecticut uses its legacy counties, not the planning regions in ACS 2022+.
ACS 5-year estimates, 2020-2024
Census American Community Survey 5-year estimates for 2020-2024, with 90% margins of error as published by the Census Bureau.
| Metric | Estimate | Margin of error (90%) | ACS table |
|---|---|---|---|
| Total population | 109,257 | none (controlled estimate) | B01003 |
| Median age | 45.1 years | ±0.3 years | B01002 |
| Households | 46,524 | ±489 | B11001 |
| Median household income (inflation-adjusted to the final ACS year) | $59,976 | ±$1,687 | B19013 |
| Median value of owner-occupied housing units | $164,000 | ±$3,160 | B25077 |
| Median gross rent | $843 | ±$35 | B25064 |
| Owner-occupied share of occupied housing units | 72.4% | none (derived from several estimates) | B25003 (derived) |
| Renter-occupied share of occupied housing units | 27.6% | none (derived from several estimates) | B25003 (derived) |
| High school graduate or higher (age 25+) | 91.7% | none (derived from several estimates) | B15003 (derived) |
| Bachelor's degree or higher (age 25+) | 25.6% | none (derived from several estimates) | B15003 (derived) |
| Share of people below the poverty level | 13.2% | none (derived from several estimates) | B17001 (derived) |
| Unemployment rate (civilian labor force) | 5.3% | none (derived from several estimates) | B23025 (derived) |
- Dollar values are in 2024 inflation-adjusted dollars.
- Percentages' margins of error are in percentage points (pp).
Geography
| Measure | Value |
|---|---|
| County FIPS | 42085 |
| Land area | 672.54 sq mi |
| Water area | 10.03 sq mi |
| Population density | 162 per sq mi of land |
| Geography vintage | 2024 Gazetteer |
ZIP codes (ZCTAs) in this county
ZCTAs that overlap the county in the Census 2020 ZCTA to county relationship file, largest share of the county's land first.
| ZCTA | Share of county land | Share of ZCTA land | County is the ZCTA's primary county |
|---|---|---|---|
| 16137 | 16.1% | 100% | Yes |
| 16125 | 15.4% | 98.4% | Yes |
| 16127 | 9.8% | 90% | Yes |
| 16145 | 7% | 100% | Yes |
| 16153 | 5.5% | 86.5% | Yes |
| 16148 | 4.7% | 100% | Yes |
| 16130 | 4.6% | 100% | Yes |
| 16133 | 4.1% | 100% | Yes |
| 16142 | 4.1% | 62.4% | Yes |
| 16124 | 4% | 100% | Yes |
| 16154 | 4% | 100% | Yes |
| 16159 | 3.7% | 89.5% | Yes |
| 16150 | 3.4% | 100% | Yes |
| 16134 | 3.2% | 46% | |
| 16311 | 2.1% | 95.4% | Yes |
| 16114 | 1.7% | 100% | Yes |
| 16156 | 1.6% | 21.4% | |
| 16314 | 1.6% | 11.4% | |
| 16143 | 1.1% | 29.3% | |
| 16146 | 0.6% | 100% | Yes |
| 16362 | 0.5% | 11.3% | |
| 16121 | 0.3% | 100% | Yes |
| 16342 | 0.3% | 3.4% | |
| 16110 | 0.3% | 24% | |
| 16057 | 0.1% | 1.1% | |
| 16113 | 0.1% | 100% | Yes |
| 16161 | 0% | 100% | Yes |
| 16151 | 0% | 100% | Yes |
Sources
- American Community Survey 5-year estimates (Census Data API) — U.S. Census Bureau. ACS 5-year 2020-2024 (release acs5-2024:county), source date 2025-09-02. https://api.census.gov/data/2024/acs/acs5?get=NAME,B01003_001E,B01003_001M,B01002_001E,B01002_001M,B11001_001E,B11001_001M,B19013_001E,B19013_001M,B25077_001E,B25077_001M,B25064_001E,B25064_001M,B25003_001E,B25003_002E,B25003_003E,B15003_001E,B15003_017E,B15003_018E,B15003_019E,B15003_020E,B15003_021E,B15003_022E,B15003_023E,B15003_024E,B15003_025E,B17001_001E,B17001_002E,B23025_003E,B23025_005E&for=county:085&in=state:42
- Published by Olympus on Oct 22, 2026.
- Source data: U.S. Census Bureau. Works of the U.S. government are not subject to copyright in the United States.
- This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
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The same figures, with provenance on every value, from the API (free API key, reference) or from an AI agent through the Olympus MCP server.
curl -s "https://api.olympus.new-odyssey.com/v1/geo-demographics/counties/42085" -H "X-API-Key: $OLYMPUS_API_KEY"get_us_demographics {"county_fips":"42085"}