1921 United States House of Representatives elections

There were special elections to the U.S. House of Representatives in 1921.

District	Incumbent			This race
District	Member	Party	First elected	Results	Candidates
Alabama 4	Fred Blackmon	Democratic	1910	Incumbent died February 8, 1921. New member elected June 7, 1921. Democratic hold.	▌Y Lamar Jeffers (Democratic) [data missing]
Arkansas 6	Samuel M. Taylor	Democratic	1912	Incumbent died September 13, 1921. New member elected October 25, 1921. Democratic hold.	▌Y Chester W. Taylor (Democratic) Unopposed
California 9	Vacant			Representative-elect Charles F. Van de Water (R) died November 20, 1920. New member elected February 15, 1921. Republican hold.	▌Y Walter F. Lineberger (Republican) 58.54% ▌Charles Hiram Randall (Prohibition) 37.99% ▌John J. Hamilton (Independent) 3.47%
Iowa 5	James W. Good	Republican	1908	Incumbent resigned June 15, 1921. New member elected. Republican hold.	▌Y Cyrenus Cole (Republican) 60.61% ▌John N. Hughes (Democratic) 39.39%
Massachusetts 6	Willfred W. Lufkin	Republican	1917	Incumbent resigned June 30, 1921. New member elected. Republican hold.	▌Y A. Piatt Andrew (Republican) 76.58% ▌Charles I. Pettingell (Democratic) 23.02%
Michigan 3	William H. Frankhauser	Republican	1920	Incumbent died May 9, 1921. New member elected June 28, 1921. Republican hold.	▌Y John M. C. Smith (Republican) 75.42% ▌Howard W. Cavenaugh (Democratic) 24.58%
Pennsylvania at-large	Mahlon Morris Garland	Republican	1914	Incumbent died November 19, 1921. New member elected September 20, 1921. Republican hold.	▌Y Thomas S. Crago (Republican) 68.41% ▌John P. Bracken (Democratic) 21.45% ▌Byron E. P. Prugh (Prohibition) 7.25% ▌Cora M. Bixler (Socialist) 2.89%