Dauphin County
Dauphin County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 286,401. The county seat is Harrisburg, Pennsylvania's state capital and ninth-most populous city. The county was created on March 4, 1785, from part of Lancaster County and was named after Louis Joseph, Dauphin of France, the first son of King Louis XVI. Dauphin County is included in the Harrisburg–Carlisle Metropolitan Statistical Area. Located within the county is Three Mile Island Nuclear Generating Station, site of the 1979 nuclear core meltdown. The nuclear power plant closed in 2019. The county is part of the South Central region of the commonwealth.
Governance bodies
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Cities and towns 17
- Borough of Berrysburg pop. 324
- Borough of Dauphin pop. 795
- Borough of Elizabethville pop. 1,350
- Borough of Gratz pop. 742
- Borough of Halifax pop. 794
- Borough of Highspire pop. 2,727
- Borough of Hummelstown pop. 4,523
- Borough of Lykens pop. 1,860
- Borough of Middletown pop. 9,587
- Borough of Millersburg pop. 2,535
- Borough of Paxtang pop. 1,636
- Borough of Penbrook pop. 3,260
- Borough of Pillow pop. 290
- Borough of Royalton pop. 1,132
- Borough of Steelton pop. 6,245
- Borough of Williamstown pop. 1,301
- City of Harrisburg pop. 50,135
Townships 23
- Township of Conewago pop. 2,964
- Township of Derry pop. 24,846
- Township of East Hanover pop. 6,002
- Township of Halifax pop. 3,336
- Township of Jackson pop. 1,829
- Township of Jefferson pop. 358
- Township of Londonderry pop. 4,885
- Township of Lower Paxton pop. 54,089
- Township of Lower Swatara pop. 9,564
- Township of Lykens pop. 1,565
- Township of Middle Paxton pop. 5,061
- Township of Mifflin pop. 814
- Township of Reed pop. 228
- Township of Rush pop. 225
- Township of South Hanover pop. 7,203
- Township of Susquehanna pop. 26,706
- Township of Swatara pop. 27,992
- Township of Upper Paxton pop. 4,017
- Township of Washington pop. 2,123
- Township of Wayne pop. 1,262
- Township of West Hanover pop. 10,871
- Township of Wiconisco pop. 1,160
- Township of Williams pop. 1,064
Reference data (Census of Governments 2022)
- Census ID (PID6)
- 173720
- FIPS state
- 42
- FIPS county
- 043
- FIPS place
- 99043
- Census record name
- COUNTY OF DAUPHIN
- Mailing address
- PO BOX 1295, HARRISBURG 17108