Anton Frank Maciejewski (January 3, 1893 – September 25, 1949) was an American businessman and politician who served as a U.S. Representative from Illinois from 1939 to 1942.

Born in Anderson, Texas, Maciejewski attended the public schools of Cicero, Illinois, and Lewis Institute, Chicago.

He served as a delegate to the Democratic National Convention in 1928, and as supervisor and treasurer of Cicero, Illinois from 1932 to 1939.

Maciejewski was elected as a Democrat to the Seventy-sixth and Seventy-seventh Congresses and served from January 3, 1939, until his resignation on December 8, 1942.

This article incorporates public domain material from the Biographical Directory of the United States Congress