According to theU.S. Census Bureau, the county has a total area of 318 square miles (820 km2), of which 316 square miles (820 km2) is land and 1.8 square miles (4.7 km2) (0.6%) is water.[3] It is the fourth-smallest county in Pennsylvania by area. Union has ahumid continental climate (Dfa/Dfb) and average temperatures in Lewisburg range from 27.2 °F in January to 72.7 °F in July, while in Hartleton they range from 26.4 °F in January to 72.1 °F in July.[4] Union County is one of the 423 counties served by theAppalachian Regional Commission,[5] and it is identified as part of the "Midlands" by Colin Woodard in his bookAmerican Nations: A History of the Eleven Rival Regional Cultures of North America.[6]
There were 13,178 households, out of which 31.10% had children under the age of 18 living with them, 59.90% weremarried couples living together, 6.90% had a female householder with no husband present, and 30.10% were non-families. 25.30% of all households were made up of individuals, and 11.80% had someone living alone who was 65 years of age or older. The average household size was 2.50 and the average family size was 3.00.
In the county, the population was spread out, with 20.10% under the age of 18, 13.90% from 18 to 24, 30.90% from 25 to 44, 21.70% from 45 to 64, and 13.40% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 123.90 males. For every 100 females age 18 and over, there were 128.50 males.
Andrew Jackson was the lastDemocratic Party candidate to win the county, in1832. The county has been solidly Republican in Presidential elections sinceJohn C. Frémont's win againstJames Buchanan in1856. The only exception wasWilliam Howard Taft's loss toTheodore Roosevelt of theBull Moose (Progressive) Party – which had splintered from the Republican Party – in1912.[19] The county has also voted for Republican Senators,[20] State Treasurers,[21] and State Auditors[22] for decades.Robert P. Casey is the only Democratic gubernatorial candidate to win the county in the last fifty years.[23] The county seat of Lewisburg is heavily Democratic, having givenJoe Biden over 70% of its vote in 2020. However, the rest of the county is overwhelmingly Republican.[24]
Map of Union County, Pennsylvania 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 most cases,towns. The following boroughs and townships are located in Union County:
Census-designated places are geographical areas designated by theU.S. Census Bureau for the purposes of compiling demographic data. They are not actual jurisdictions under Pennsylvania law. Otherunincorporated communities, such as villages, may be listed here as well.
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