Monroe v. Pape, 365 U.S. 167 (1961), was a United States Supreme Court case that considered the application of federal civil rights law to constitutional violations by city employees. The case was significant because it held that 42 U.S.C. § 1983, a statutory provision from 1871, could be used to sue state officers who violated a plaintiff's constitutional rights. § 1983 had previously been a relatively obscure and little-used statute, but since Monroe it has become a central part of United States civil rights law.