According to the U.S. Census Bureau, the county has a total area of 522 square miles (1,350km2), of which 519 square miles (1,340km2) is land and 3.1 square miles (8.0km2) (0.6%) is water.[4] The Borough of Gettysburg is located at the center of Adams County. This county seat community is surrounded on three sides by the Gettysburg National Military Park (GNMP). The Eisenhower National Historic Site adjoins GNMP on its southwestern edge. Most of Adams County's rural landscapes and its mid-19th century roadway pattern remain intact today. Thirteen historic roadways converge at or near Gettysburg Borough. Two circular rings of towns surround Gettysburg; the first is typically found at a distance of approximately 7 miles (11km) from Gettysburg. The second ring is found at a distance of 12 to 15 miles (24km) from the county seat. This "spokes and wheel" pattern is one of the few examples of Central Place Theory in the Eastern United States.
Adams County is administered by a three-person board of commissioners, who serve four-year terms. Elections occur in the odd-numbered years that precede U.S. presidential elections, with the most recent election falling in 2023. All three commissioners are chosen in the same election, and voters may vote for no more than two of the candidates. The commissioners are responsible for the management of the fiscal and administrative functions of the county.
Adams is a consistently Republican county, like most of South Central Pennsylvania. In 2020, Donald Trump carried the county with 66.3% of the vote to Joe Biden's 32.2%. In 2016, Democratic nominee Hillary Clinton only received 29.6% of the vote, the lowest share any Democrat had received in the county since George McGovern 44 years prior.[7] No Democratic presidential candidate has won Adams County since Lyndon Johnson's 1964 landslide.[8] However, Democratic strength exists in Gettysburg, which Biden carried 63%-35%.[9]
United States presidential election results for Adams County, Pennsylvania[10]
Adams County consists of two Pennsylvania House Districts. The 91st district is exclusively in Adams County, comprising the southern and middle parts of the county, including Gettysburg. The 193rd District spans into Cumberland County to the north.
From 2012 until 2018, Adams County was part of the 4th Congressional District until the Pennsylvania Supreme Court ruled that the Commonwealth's Congressional Districts constituted an illegal partisan Gerrymander.[11] As a result, Adams County was moved from the 4th District to the 13th Congressional District and elected a new representative in the 2018 election.
As of February 8, 2025, there were 74,542 registered voters in the county. Republicans hold a majority of the voters. There were 43,362 registered Republicans, 18,828 registered Democrats, 9,476 voters without any partisan affiliation, and 2,876 voters registered to other parties. "Other parties" also includes voters who left their preferred party blank; only those who chose "no affiliation" are included under "no partisan affiliation".[13]
As of the 2022,[20] there were 106,027 people and 40,676 households in the county. The population density was 204.4 people per square mile. There were 43,653 housing units with 76% of the units owner occupied.
90.7% of the population 25 years and over were high school graduates, and 24.3% had a bachelor's degree or higher. Per capita income was $36,150, and the median household income was $76,727. 8.4% of the population lived below the poverty line.
There were 40,676 households, of which 68% were married couples living together, 10% had a female householder with no husband present, 4% had a male householder with no wife present, and 17% were non-families. The average household size was 2.5. The median value of owner-occupied housing units was $255,900.
Gettysburg Adventist Christian School – Gettysburg
Indian Acres Amish School - Gettysburg
JIL Christian School – Biglerville
Pheasant Cottage Amish School - Littlestown
St. Francis Xavier School - Gettysburg
St. Teresa of Calcutta School (Conewago) - Hanover
St. Teresa of Calcutta School -McSherrystown
Intermediate Unit
Lincoln Intermediate Unit (IU#12) region includes Adams, Franklin, and York counties. The agency offers school districts, home schooled students and private schools many services including: Special education services, combined purchasing, and instructional technology services. It runs Summer Academy, which offers both art and academic strands designed to meet the needs of gifted, talented and high achieving students. Additional services include: Curriculum Mapping, Professional Development for school employees, Adult Education, Nonpublic School Services, Business Services, Migrant & ESL (English as a Second Language), Instructional Services, Special Education, Management Services, and Technology Services. It provides a GED program for adults to earn a high school diploma, and offers literacy programs. The Lincoln Intermediate Unit is governed by a 13-member board of directors, each a member of a local school board from the 25 school districts. Board members are elected by school directors of all 25 school districts for three-year terms that begin July 1.[26] There are 29 intermediate units in Pennsylvania. They are funded by school districts, state and federal program specific funding and grants; they do not have the power to tax.
Map of Adams County with municipal labels showing boroughs (red), townships (white), and census-designated places (blue)
Under Pennsylvania law, there are four types of incorporated municipalities: cities, boroughs, townships, and, in at most two cases, towns. The following boroughs and townships are located in Adams County, as well as unincorporated areas and CDPs:
Census-designated places are geographical areas designated by the U.S. Census Bureau for the purposes of compiling demographic data, but are not actual jurisdictions under Pennsylvania law. Other unincorporated communities, such as villages, may be listed here as well.
↑ Includes Lancaster, York, Berks, Dauphin, Cumberland, Franklin, Lebanon, Adams and Perry Counties
References
↑ "PHMC Historical Markers Search". Pennsylvania Historical and Museum Commission. Commonwealth of Pennsylvania. Archived from the original(Searchable database) on March 21, 2016. Retrieved January 25, 2014.
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