County demographics · Pennsylvania
Montgomery County, Pennsylvania demographics
Montgomery County, Pennsylvania (county FIPS 42091) has a median household income of $113,915 (±$1,905) and a total population of 867,573 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. 71 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 | 867,573 | none (controlled estimate) | B01003 |
| Median age | 41.2 years | ±0.2 years | B01002 |
| Households | 335,505 | ±932 | B11001 |
| Median household income (inflation-adjusted to the final ACS year) | $113,915 | ±$1,905 | B19013 |
| Median value of owner-occupied housing units | $436,700 | ±$2,838 | B25077 |
| Median gross rent | $1,683 | ±$19 | B25064 |
| Owner-occupied share of occupied housing units | 71.4% | none (derived from several estimates) | B25003 (derived) |
| Renter-occupied share of occupied housing units | 28.6% | none (derived from several estimates) | B25003 (derived) |
| High school graduate or higher (age 25+) | 95.1% | none (derived from several estimates) | B15003 (derived) |
| Bachelor's degree or higher (age 25+) | 53% | none (derived from several estimates) | B15003 (derived) |
| Share of people below the poverty level | 6.5% | none (derived from several estimates) | B17001 (derived) |
| Unemployment rate (civilian labor force) | 4.5% | 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 | 42091 |
| Land area | 482.94 sq mi |
| Water area | 4.25 sq mi |
| Population density | 1,796 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 |
|---|---|---|---|
| 19426 | 7% | 100% | Yes |
| 19464 | 5.3% | 99.2% | Yes |
| 19473 | 5% | 100% | Yes |
| 19446 | 4.7% | 100% | Yes |
| 19403 | 4.6% | 100% | Yes |
| 19438 | 4.6% | 100% | Yes |
| 19002 | 4.2% | 100% | Yes |
| 18074 | 3.7% | 100% | Yes |
| 19525 | 3.5% | 99.8% | Yes |
| 19468 | 3.5% | 100% | Yes |
| 18073 | 3.2% | 84.9% | Yes |
| 18054 | 2.8% | 80% | Yes |
| 19406 | 2.8% | 100% | Yes |
| 18969 | 2.7% | 81% | Yes |
| 19422 | 2.5% | 100% | Yes |
| 19454 | 2.5% | 99.1% | Yes |
| 19006 | 2.5% | 91% | Yes |
| 19044 | 1.9% | 100% | Yes |
| 19440 | 1.8% | 75.2% | Yes |
| 18964 | 1.7% | 88.6% | Yes |
| 19462 | 1.7% | 100% | Yes |
| 19038 | 1.7% | 100% | Yes |
| 18041 | 1.7% | 64.1% | Yes |
| 19428 | 1.5% | 100% | Yes |
| 19034 | 1.5% | 100% | Yes |
| 19046 | 1.4% | 100% | Yes |
| 19504 | 1.4% | 28.5% | |
| 19460 | 1.3% | 18.4% | |
| 19401 | 1.3% | 100% | Yes |
| 19040 | 1.2% | 98.7% | Yes |
| 19444 | 1% | 100% | Yes |
| 19035 | 1% | 100% | Yes |
| 19090 | 1% | 100% | Yes |
| 19027 | 0.8% | 100% | Yes |
| 19010 | 0.8% | 44.8% | |
| 19096 | 0.7% | 95.2% | Yes |
| 19025 | 0.7% | 100% | Yes |
| 19001 | 0.7% | 100% | Yes |
| 19072 | 0.7% | 100% | Yes |
| 19031 | 0.6% | 100% | Yes |
| 19085 | 0.6% | 43.2% | |
| 19004 | 0.6% | 100% | Yes |
| 19087 | 0.5% | 15.3% | |
| 19095 | 0.4% | 100% | Yes |
| 18070 | 0.4% | 60.7% | Yes |
| 19075 | 0.4% | 100% | Yes |
| 19012 | 0.4% | 100% | Yes |
| 19492 | 0.3% | 100% | Yes |
| 19066 | 0.3% | 100% | Yes |
| 19009 | 0.3% | 100% | Yes |
| 18076 | 0.3% | 100% | Yes |
| 18936 | 0.2% | 100% | Yes |
| 18915 | 0.2% | 100% | Yes |
| 19435 | 0.2% | 100% | Yes |
| 19437 | 0.2% | 100% | Yes |
| 19041 | 0.2% | 32.3% | |
| 19405 | 0.2% | 100% | Yes |
| 19003 | 0.2% | 46.1% | |
| 19490 | 0.2% | 100% | Yes |
| 19453 | 0.1% | 100% | Yes |
| 19512 | 0.1% | 1.5% | |
| 19472 | 0.1% | 100% | Yes |
| 19505 | 0.1% | 7.2% | |
| 18914 | 0.1% | 1.4% | |
| 19436 | 0% | 100% | Yes |
| 19456 | 0% | 100% | Yes |
| 19128 | 0% | 2.4% | |
| 19474 | 0% | 100% | Yes |
| 19477 | 0% | 100% | Yes |
| 19118 | 0% | 1.8% | |
| 19083 | 0% | 0.4% |
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:091&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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curl -s "https://api.olympus.new-odyssey.com/v1/geo-demographics/counties/42091" -H "X-API-Key: $OLYMPUS_API_KEY"get_us_demographics {"county_fips":"42091"}