Total Population in Delaware County, PA
ACS 2024 5-Year Estimates
How Delaware County Compares
National Distribution
Where Delaware County falls among all 3,222 U.S. counties for total population.
■ Delaware County: 579,222
Ranking Context
| Rank | County | Value |
|---|---|---|
| #118 | Volusia County, FL | 579,622 |
| #119 | Jefferson County, CO | 579,377 |
| #120 | Union County, NJ | 579,290 |
| #121 | Delaware County, PA | 579,222 |
| #122 | New Castle County, DE | 577,961 |
| #123 | Baltimore city, MD | 573,243 |
| #124 | Dane County, WI | 572,674 |
Total Population in Delaware County, Pennsylvania
Delaware County, Pennsylvania has a total population of 579,222, which ranks #121 of 3,222 out of 3,222 counties nationwide. This is 99.8% below the national value of 330M.
Within Pennsylvania, Delaware County ranks #5 of 67 out of 67 counties. This places it in the 96th percentile nationally.
Total population count from the American Community Survey. All data comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates for 2024.
About this data
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2024). All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.