William or Bill Monroe may refer to:
Bill Monroe (1911–1996), American bluegrass musician Bill Monroe (1900s infielder) (c. 1877–1915), Negro league baseball player Bill Monroe (1920s infielder), Negro league baseball player Bill Monroe (journalist) (1920–2011), American journalist and NBC News correspondent Will Seymour Monroe (1863–1939), American writer and educator William Newton Monroe (fl. 1879–1881), founder of Monrovia, California William Monroe, for whom William Monroe High School in Virginia was named in 1925 William T. Monroe, United States Ambassador to Bahrain in 2004–2007 William Monroe, character in the 2020 film Inheritance
See also William Monroe Trotter (1872–1934), American banker and activist William Monroe Trotter House, a Boston landmark William Munroe (disambiguation)