Dauphin County
Sign in to savecounty in Pennsylvania, United States
Key facts
- Country
- United States
- State
- Pennsylvania
- Founded
- March 4, 1785
- Named after
- Louis Joseph, Dauphin of France
- Seat
- Harrisburg
- Largest township
- Lower Paxton Township
- Total
- 558 sq mi (1,450 km )
- Land
- 525 sq mi (1,360 km )
- Water
- 33 sq mi (85 km ) 5.9%
- Estimate 2025
- 293,351
- Density
- 546/sq mi (211/km )
- Time zone
- UTC−5 ( Eastern )
- Summer dst
- UTC−4 ( EDT )
- Area code
- 717 and 223
- Congressional district
- 10th
- Website
- www .dauphincounty .gov
- Designated
- December 9, 1982
via Wikipedia infobox
Article
Dauphin County (/ˈdɔːfɪn/) 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.
Geography