The U.S. state of Pennsylvania elected its United States representatives at-large on a general ticket for the first and third United States Congresses. General ticket representation was prohibited by the 1842 Apportionment Bill and subsequent legislation, most recently in 1967 (Pub. L.Tooltip Public Law (United States) 90–196, 2 U.S.C. § 2c).

Some representatives, including Galusha A. Grow, served at-large after 1842 (in Grow's case, it was from 1894 to 1903). This was allowed because Pennsylvania had received an increase in the number of its representatives yet its legislature didn't pass an apportionment bill during those years.

• Martis, Kenneth C. (1989). The Historical Atlas of Political Parties in the United States Congress. New York: Macmillan Publishing Company.
• Martis, Kenneth C. (1982). The Historical Atlas of United States Congressional Districts. New York: Macmillan Publishing Company.
• Congressional Biographical Directory of the United States 1774–present

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