Robert Thaddeus McLoskey (June 26, 1907 – November 2, 1990) was a U.S. Representative from Illinois.^[1]

Born in Monmouth, Illinois, McLoskey graduated from Monmouth High School in Monmouth, Illinois in 1924. He earned a B.A. from Monmouth College, Monmouth, Illinois in 1928 and a certificate in mortuary science from Worsham College in Chicago, Illinois in 1932. He served as a funeral director and later as tax supervisor for Warren County, Illinois from 1935 to 1939 then as a field supervisor for the Illinois Department of Public Health's Bureau of Vital Statistics from 1940 to 1950.^[1]

He was a member of the Illinois House of Representatives from 1951 to 1962. He also worked as a farm operator and manager.

McLoskey was elected as a Republican in Illinois's 19th District to the Eighty-eighth Congress (January 3, 1963 – January 3, 1965).^[1]

He was an unsuccessful candidate for reelection to the Eighty-ninth Congress in 1964. He served as chairman of the Warren County, Illinois, planning commission from 1969 to 1972.

He died on November 2, 1990, in Monmouth, Illinois.^[1] His remains were cremated.