Erie County is the northernmost county in the Commonwealth of Pennsylvania. As of the 2025 census estimate, the population was 265,832. Its county seat is Erie. The county was created in 1800 and later organized in 1803. The county is part of the Northwest region of the commonwealth.
History The federal government resolved competing claims over the Erie Triangle in 1792, allowing Pennsylvania to purchase the land. Before the resolution, both New York and Pennsylvania had claimed the territory, preventing the formation of county boundaries. On March 12, 1800, Pennsylvania established Erie County from a portion of Allegheny County, which had absorbed the Erie Triangle following the acquisition. Other states attempted to claim the region, but Pennsylvania ultimately secured the area through formal cession.
Because Erie County and its neighboring counties—Crawford, Mercer, Venango, and Warren—initially lacked the population and resources to sustain independent governments, state officials established a temporary five-county administrative unit based in Meadville, Crawford County, to manage regional affairs. Erie County elected its first local officials in 1803. A fire destroyed the Erie County Courthouse on March 23, 1823, erasing all county records accumulated up to that date.
Immigrants of "Yankee" stock—descendants of English Puritans who originally settled New England—first settled Erie County. These early settlers primarily came from Connecticut, Rhode Island, and Maine, often via Upstate New York. They made Erie County culturally similar to New England rather than to the rest of Pennsylvania. They laid out roads, established post routes, constructed public buildings, and encouraged further migration. Many settlers from upstate New York had only recently relocated there from New England following the American Revolutionary War, creating a strong cultural continuity with early New England.
Erie County was part of the Underground Railroad, giving slaves the ability to gain freedom through Lake Erie into Canada, East through New York State, or to stay in Erie with the help of abolitionists and the free black community.Meyer, Melinda.Journey to Freedom National Park Service. Erie County Historical Society. November 17, 2010. http://www.nps.gov. (December 6, 2012)
Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (49%) is water. It is the largest county in Pennsylvania by total area. Except for a high ridge several miles from the lake, running nearly parallel to its shore, the terrain is generally rolling and well-watered. It is the only county in the state that occupies a significant amount of land north of the 42nd parallel.
There are two cities in Erie County: Erie and Corry. Other notable population centers include Millcreek, Harborcreek, Summit, and Fairview townships, as well as the boroughs of Edinboro, North East, Girard, Waterford, and Union City. Erie County is bordered on the northeast by Chautauqua County, New York, on the east by Warren County, on the south by Crawford County, and on the west by Ashtabula County, Ohio. Directly north of the county is Lake Erie. Erie County occupies a position on Lake Erie that makes it the only county in Pennsylvania to share a border with Canada, located across the lake on the far shore.
Most of the county has a warm-summer humid continental climate (Dfb), except at lower elevations near enough to the lake, where a hot-summer humid continental climate (Dfa) exists. Average monthly temperatures in downtown Erie range from 26.4 °F in January to 70.8 °F in July, while in Corry, they range from 23.8 °F in January to 68.2 °F in July. The hardiness zone in most of Erie County by area is 6a. It has warmed to 7a along the Lake, and the area between the shore and a line a little south of Interstate 90 is 6b.
Because of its location in the northwesternmost part of the state, Erie County is the only county to border both New York and Ohio. It is also the only county in the state on the Canadian border.
Adjacent counties Haldimand County, Ontario (north) (separated by Lake Erie) Chautauqua County, New York (northeast) Warren County (southeast) Crawford County (south) Ashtabula County, Ohio (southwest) Norfolk County, Ontario (northwest) (separated by Lake Erie)
Major highways
Demographics
Racial and ethnic composition +Erie County, Pennsylvania – Racial and ethnic compositionRace / Ethnicity (NH = Non-Hispanic)Pop 1980Pop 1990Pop 2000Pop 2010 Pop 2020% 1980% 1990% 2000% 2010% 2020White alone (NH)263,703256,177252,258242,787219,18094.25%92.96%89.82%86.53%80.92%Black or African American alone (NH)12,29814,00816,87619,48519,8214.40%5.08%6.01%6.94%7.32%Native American or Alaska Native alone (NH)3324173964473430.12%0.15%0.14%0.16%0.13%Asian alone (NH)9741,3741,9023,0366,3580.35%0.50%0.68%1.08%2.35%Native Hawaiian or Pacific Islander alone (NH)x included in the Asian category in the 1980 Censusx included in the Asian category in the 1990 Census567258xx0.02%0.03%0.02%Other race alone (NH)4232323202921,0460.15%0.08%0.11%0.10%0.39%Mixed race or Multiracial (NH)x not an option in the 1980 Censusx not an option in the 1990 Census2,9094,92912,040xx1.04%1.76%4.44%Hispanic or Latino (any race)2,0503,3646,1269,51812,0300.73%1.22%2.18%3.39%4.44%Total279,780275,572280,843280,566270,876 100.00%100.00%100.00%100.00%100.00%
2020 census
As of the 2020 census, Erie County had a population of 270,876, with 109,371 households and 66,504 families. The median age was 40.6 years; 20.9% of residents were under the age of 18 and 19.0% were 65 years of age or older. For every 100 females there were 97.7 males, and for every 100 females age 18 and over there were 96.1 males age 18 and over.
Of the 109,371 households, 26.8% had children under the age of 18 living in them. Of all households, 42.7% were married-couple households, 20.5% were households with a male householder and no spouse or partner present, and 29.0% were households with a female householder and no spouse or partner present. About 31.3% of all households were made up of individuals and 13.3% had someone living alone who was 65 years of age or older.
There were 119,791 housing units, of which 8.7% were vacant. Among occupied housing units, 65.8% were owner-occupied and 34.2% were renter-occupied. The homeowner vacancy rate was 1.3% and the rental vacancy rate was 8.5%.
76.0% of residents lived in urban areas, while 24.0% lived in rural areas.
The racial makeup of the county was 82.2% White, 7.6% Black or African American, 0.2% American Indian and Alaska Native, 2.4% Asian, <0.1% Native Hawaiian and Pacific Islander, 1.7% from some other race, and 5.9% from two or more races. Hispanic or Latino residents of any race comprised 4.4% of the population.
American Community Survey estimates
Ancestry data, based on American Community Survey estimates, indicated that approximately 24 percent of residents were of German descent, 12.5 percent Polish, 12.3 percent Italian, 10.1 percent Irish, 6.5 percent English, and 6.4 percent identified as having "American" ancestry.
Metropolitan Statistical Area
The United States Office of Management and Budget has designated Erie County as the Erie, PA Metropolitan Statistical Area (MSA). As of the 2010 U.S. census the metropolitan area ranked 11th-most populous in Pennsylvania and the 164th-most populous in the United States with a population of 280,566.
Erie County is part of the larger Erie-Meadville, PA Combined Statistical Area (CSA), which combines the populations of Erie County as well as Crawford County to the south. The Combined Statistical Area ranked seventh in Pennsylvania and 102nd-most populous in the United States with a population of 369,331.
Largest populations in Erie County 2023 rankCityType2023 estimate2020 CensusChangeHighest Population (Year)1ErieCity 138,440 (1960)2Millcreek Township 54,256 (2013)3HarborcreekTownship 17,629 (2014)4FairviewTownship 11,270 (2023)5SummitTownship 7,339 (2020)6North EastTownship 7,702 (2000)7CorryCity 7,911 (1950)8EdinboroBorough 7,736 (1990)
Government and politics Before 1960, Erie County was primarily Republican in presidential elections, only backing Democratic Party candidates in four elections from 1888 to 1956. Since 1960, the county has become primarily Democratic, with only five Republican wins in presidential elections from 1960 to the present. Nevertheless, since the 2016 presidential election, the county has become increasingly competitive, with Donald Trump narrowly winning the county that year, followed by Joe Biden narrowly flipping the county in 2020. Most recently, Trump reclaimed it in 2024. Since 1992, the county has voted for the statewide winner in presidential elections, and has done so in all but one since 1948.
The county seat of government is in Erie. Erie County operates under a home-rule charter and elects a county executive to manage its government. The current County Executive is Christina Vogel. Vogel assumed the office on January 5, 2026, following the defeat of Brenton Davis. The remaining elected officials of the executive branch are the Erie County Controller, Erie County Coroner, Erie County District Attorney, Erie County Sheriff, and Erie County Clerk of Records. see latest list
+ Erie County Executives Name Party Term start Term end Russell Robison Republican 1978 1982 Judith M. Lynch Democratic 1982 2002 Richard Schenker Republican 2002 2006 Mark A. DiVecchio Democratic 2006 2010 Barry Grossman Democratic 2010 2014 Kathleen Dahlkemper Democratic 2014 2022 Brenton DavisRepublican20222026 Christina Vogel Democratic 2026 Incumbent
Row officers Office Holder Party County Executive Christina Vogel Democrat Clerk of Records Aubrea Hagerty-Haynes Democratic Controller Kyle Foust Democratic Coroner Lyell Cook Republican District Attorney Elizabeth Hirz Republican Sheriff Chris Campanelli Democratic
Judiciary Nine judges serve on the Erie County Court of Common Pleas, and fifteen magisterial district judges preside over the county's district courts. A district court administrator, along with a deputy and an assistant court administrator, manages court operations. Erie County maintains its courthouse near Perry Square in downtown Erie, operates a county prison, and oversees a combined 911/Emergency Management Agency through the Erie County Department of Public Safety in Summit Township.
Politics As of September 15, 2026, there are 174,717 registered voters in Erie County. + Voter Registration Statistics in Erie County, Pennsylvania (as of Feb 9, 2026) Party- Registered Voters Democratic 76,410 Republican 70,769 Independent / No Affiliation 20,892
The county is considered a bellwether politically.
State Senate Senator Party District Dan Laughlin Republican Pennsylvania's 49th Senatorial District Scott Hutchinson Republican Pennsylvania's 21st Senatorial District
State House of Representatives Representative Party District Patrick J. Harkins Democratic Pennsylvania's 1st Representative District Robert Merski Democratic Pennsylvania's 2nd Representative District Ryan Bizzarro Democratic Pennsylvania's 3rd Representative District Jake Banta Republican Pennsylvania's 4th Representative District Brad Roae Republican Pennsylvania's 6th Representative District
United States Senate Senator Party John Fetterman Democratic Dave McCormick Republican
United States House of Representatives Representative Party District Mike Kelly Republican Pennsylvania's 16th congressional district
Education
Public school districts
School districts include: - Text list
Corry Area School District Erie City School District Fairview School District Fort LeBoeuf School District General McLane School District Girard School District Harbor Creek School District Iroquois School District Millcreek Township School District North East School District Northwestern School District Union City Area School District