County demographics · Pennsylvania
Delaware County, Pennsylvania demographics
Delaware County, Pennsylvania (county FIPS 42045) has a median household income of $89,546 (±$1,375) and a total population of 579,222 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. 45 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 | 579,222 | none (controlled estimate) | B01003 |
| Median age | 39.1 years | ±0.2 years | B01002 |
| Households | 216,946 | ±987 | B11001 |
| Median household income (inflation-adjusted to the final ACS year) | $89,546 | ±$1,375 | B19013 |
| Median value of owner-occupied housing units | $332,200 | ±$4,050 | B25077 |
| Median gross rent | $1,372 | ±$22 | B25064 |
| Owner-occupied share of occupied housing units | 69.6% | none (derived from several estimates) | B25003 (derived) |
| Renter-occupied share of occupied housing units | 30.4% | none (derived from several estimates) | B25003 (derived) |
| High school graduate or higher (age 25+) | 93.9% | none (derived from several estimates) | B15003 (derived) |
| Bachelor's degree or higher (age 25+) | 41.9% | none (derived from several estimates) | B15003 (derived) |
| Share of people below the poverty level | 10.2% | none (derived from several estimates) | B17001 (derived) |
| Unemployment rate (civilian labor force) | 6.9% | 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 | 42045 |
| Land area | 183.81 sq mi |
| Water area | 6.79 sq mi |
| Population density | 3,151 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 |
|---|---|---|---|
| 19063 | 13.7% | 100% | Yes |
| 19342 | 10.4% | 96.7% | Yes |
| 19073 | 8.8% | 78.6% | Yes |
| 19317 | 5.1% | 43.2% | |
| 19014 | 5% | 100% | Yes |
| 19060 | 4.2% | 100% | Yes |
| 19064 | 3.9% | 100% | Yes |
| 19061 | 3.8% | 100% | Yes |
| 19008 | 3.6% | 100% | Yes |
| 19013 | 3.1% | 100% | Yes |
| 19083 | 3% | 99.6% | Yes |
| 19087 | 2.9% | 34.7% | |
| 19010 | 2.5% | 55.2% | Yes |
| 19086 | 2.2% | 100% | Yes |
| 19050 | 2% | 100% | Yes |
| 19026 | 2% | 100% | Yes |
| 19085 | 1.9% | 56.8% | Yes |
| 19373 | 1.7% | 96% | Yes |
| 19153 | 1.6% | 28.7% | |
| 19015 | 1.6% | 100% | Yes |
| 19018 | 1.5% | 100% | Yes |
| 19082 | 1.4% | 100% | Yes |
| 19041 | 1.2% | 67.7% | Yes |
| 19029 | 1.2% | 100% | Yes |
| 19081 | 1.2% | 100% | Yes |
| 19078 | 1.1% | 100% | Yes |
| 19023 | 1.1% | 100% | Yes |
| 19079 | 0.9% | 100% | Yes |
| 19036 | 0.8% | 100% | Yes |
| 19022 | 0.7% | 100% | Yes |
| 19032 | 0.7% | 100% | Yes |
| 19382 | 0.6% | 2.6% | |
| 19033 | 0.6% | 100% | Yes |
| 19003 | 0.6% | 53.9% | Yes |
| 19070 | 0.6% | 100% | Yes |
| 19094 | 0.4% | 100% | Yes |
| 19074 | 0.4% | 100% | Yes |
| 19076 | 0.4% | 100% | Yes |
| 19113 | 0.4% | 100% | Yes |
| 19017 | 0.3% | 100% | Yes |
| 19319 | 0.3% | 74.4% | Yes |
| 19312 | 0.2% | 4.2% | |
| 19043 | 0.2% | 100% | Yes |
| 19052 | 0.1% | 100% | Yes |
| 19096 | 0.1% | 4.8% |
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:045&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/42045" -H "X-API-Key: $OLYMPUS_API_KEY"get_us_demographics {"county_fips":"42045"}