| County: | Warren County |
| State: | Pennsylvania |
| Founded Date: | October 1 |
| Founded Year: | 1819 |
| Seat Wl: | Warren |
| Largest City Wl: | Warren |
| Area Total Sq Mi: | 899 |
| Area Land Sq Mi: | 884 |
| Area Water Sq Mi: | 14.1 |
| Area Percentage: | 1.6% |
| Census Yr: | 2020 |
| Pop: | 38,587 |
| Density Sq Mi: | 44 |
| Web: | https://warrencountypa.gov/ |
| Time Zone: | Eastern |
| Ex Image: | Warren County Courthouse Jul 12.jpg |
| Ex Image Cap: | Warren County Courthouse |
| District: | 15th |
Warren County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 38,587.[1] Its county seat is Warren.[2] The county was established in 1800 from parts of Allegheny and Lycoming counties; attached to Crawford County until 1805 and then to Venango County until Warren was formally established in 1819.[3]
Warren County makes up the Warren, Pennsylvania micropolitan statistical area. The county is part of the North Central Pennsylvania region of the state.
According to the U.S. Census Bureau, the county has a total area of, of which is land and (1.6%) is water.[4] Notable physical features include the Allegheny River, the Allegheny Reservoir, the Kinzua Dam, and the Allegheny National Forest.
Warren county has a warm-summer humid continental climate (Dfb) and average temperatures in the city of Warren range from 24.5 °F in January to 69.3 °F in July.[5]
There is one Pennsylvania state park in Warren County. Chapman State Park is adjacent to Allegheny National Forest and State Game Land 29 just of U.S. Route 6, near Clarendon. Warren County also contains a tract of old-growth forest called Hearts Content National Scenic Area.
See also: List of micropolitan statistical areas.
The United States Office of Management and Budget[6] has designated Warren County as the Warren, PA Micropolitan Statistical Area (μSA).[7] As of the 2010 U.S. Census[8] the micropolitan area ranked 14th most populous in the State of Pennsylvania and the 298th most populous in the United States with a population of 41,815.
As of the census[9] of 2000, there were 43,863 people, 17,696 households, and 12,121 families residing in the county. The population density was 50/mi2. There were 23,058 housing units at an average density of 26/mi2. The racial makeup of the county was 98.68% White, 0.21% Black or African American, 0.19% Native American, 0.27% Asian, 0.02% Pacific Islander, 0.12% from other races, and 0.52% from two or more races. 0.34% of the population were Hispanic or Latino of any race. 22.2% were of German, 12.4% Swedish, 11.2% American, 10.5% Irish, 8.8% English, 8.2% Italian, and 5.1% Polish ancestry.
There were 17,696 households, out of which 29.80% had children under the age of 18 living with them, 56.10% were married couples living together, 8.40% had a female householder with no husband present, and 31.50% were non-families. 27.20% of all households were made up of individuals, and 12.20% had someone living alone who was 65 years of age or older. The average household size was 2.42 and the average family size was 2.93.
In the county, the population was spread out, with 24.10% under the age of 18, 6.40% from 18 to 24, 27.00% from 25 to 44, 25.90% from 45 to 64, and 16.70% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 96.20 males. For every 100 females age 18 and over, there were 92.80 males.
| White (NH) | 36,310 | 94.1% | |
| Black or African American (NH) | 144 | 0.37% | |
| Native American (NH) | 71 | 0.18% | |
| Asian (NH) | 154 | 0.4% | |
| Pacific Islander (NH) | 5 | 0.01% | |
| Other/Mixed (NH) | 1,488 | 4% | |
| Hispanic or Latino | 415 | 1% |
|}
As of February 21, 2022, there are 26,281 registered voters in Warren County.[11]
per Education Names and Addresses directory which is annually developed by the Pennsylvania Department of Education, 2016
Under Pennsylvania law, there are four types of incorporated municipalities: cities, boroughs, townships, and, in at most two cases, towns. The following cities, boroughs and townships are located in Warren County:
Census-designated places are geographical areas designated by the U.S. Census Bureau for the purposes of compiling demographic data. They are not actual jurisdictions under Pennsylvania law.
Some communities are neither incorporated nor treated as census-designated places.
The population ranking of the following table is based on the 2010 census of Warren County.[8]
† county seat
| Rank | City/Town/etc. | Municipal type | Population (2010 Census) | |
|---|---|---|---|---|
| 1 | † Warren | City | 9,710 | |
| 2 | North Warren | CDP | 1,934 | |
| 3 | Youngsville | Borough | 1,729 | |
| 4 | Russell | CDP | 1,408 | |
| 5 | Sheffield | CDP | 1,132 | |
| 6 | Columbus | CDP | 824 | |
| 7 | Tidioute | Borough | 688 | |
| 8 | Sugar Grove | Borough | 613 | |
| 9 | Starbrick | CDP | 522 | |
| 10 | Clarendon | Borough | 450 | |
| 11 | Bear Lake | Borough | 164 |