Map of Dauphin County, Pennsylvania

Dauphin County (/ˈdɔːfɪn/; Pennsylvania Dutch: Daffin Kaundi) is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 286,401. The county seat and the largest city is Harrisburg, Pennsylvania’s state capital and ninth largest 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.

Dauphin County overview:
Name:Dauphin County
FIPS code:42-043
State:Pennsylvania
Founded:March 4, 1785
Named for:Louis Joseph, Dauphin of France
Seat:Harrisburg
Largest city:Harrisburg
Total Area:558 sq mi (1,450 km²)
Land Area:525 sq mi (1,360 km²)
Total Population:287,400
Time zone:UTC−5 (Eastern)
Summer Time Zone (DST):UTC−4 (EDT)
Website:www.dauphincounty.org

Dauphin County location map. Where is Dauphin County?

Dauphin County location on the U.S. Map. Where is Dauphin County.
Location of Dauphin County in the the United States.
Dauphin County location on the Pennsylvania map. Where is Dauphin County.
Location of Dauphin County in Pennsylvania.

Dauphin County Road Map

Dauphin CountyStreet Map.
Street map of Dauphin County, Pennsylvania. Source: OpenStreetMap (OSM)
Dauphin CountyMap
Dauphin Countypolitical map.

Geography

According to the U.S. Census Bureau, the county has a total area of 558 square miles (1,450 km), of which 525 square miles (1,360 km) is land and 33 square miles (85 km) (5.9%) is water. The county is bound to its western border by the Susquehanna River (with the exception of a small peninsula next to Duncannon). The area code is 717 with an overlay of 223.

Adjacent counties

Major roads and highways

  • I-76 / Penna Turnpike
  • I-81
  • I-83
  • I-283
  • US 11 / US 15
  • US 22
  • US 209
  • US 322
  • US 422
  • PA 25
  • PA 39
  • PA 147
  • PA 225
  • PA 230
  • PA 283
  • PA 325
  • PA 341
  • PA 441
  • PA 443
  • PA 743
  • PA 849
  • SR 3032

Climate

Most of the county by area has a humid continental climate (Dfa except for some Dfb in highlands.) The inclusion of temperature numbers for the past decade shows some lower-lying areas, including Harrisburg, to have a humid subtropical climate (Cfa.) The hardiness zone ranges from 6a to 7a.

Dauphin County Topographic Map

Topographic Map of Dauphin County, Pennsylvania
Dauphin County Topo map.

Dauphin County Satellite Map

Satellite Map of Dauphin County, Pennsylvania
Dauphin County satellite map.

Dauphin County Outline Map

Outline Map of Dauphin County, Pennsylvania
Dauphin County outline map.
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Parent Unit Map

Map of United States
The United States (US) covers a total area of 9,833,520 sq. km. Of this area, the 48 contiguous states and the District of Columbia cover 8,080,470 sq. km. The archipelago of Hawaii has an area of 28,311 sq. km while the remaining area is part of the US territories. The greatest east-west distance in the ... Read more
Map of United States
Political map of Pennsylvania State – Printable Collection
Pennsylvania (/ˌpɛnsɪlˈveɪniə/ (listen); Pennsylvania German: Pennsilfaani), officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. Pennsylvania borders Delaware to its southeast, Maryland to its south, West Virginia to its southwest, Ohio to its west, Lake Erie and the Canadian province of Ontario to ... Read more
Political map of Pennsylvania State – Printable Collection

Related Administrative Divisions

Sub-Administrative Units Maps