Thomas Ray Hamer (May 4, 1864 – December 22, 1950) was a United States Representative from Idaho.

Hamer served as a single term as a Republican in the House from 1909 to 1911, representing the state at-large.

Hamer attended Hedding College, and Indiana University School of Law - Bloomington (now Indiana University Maurer School of Law), and was admitted to the bar and commenced practice in St. Anthony, Idaho, in 1893.

He engaged in agricultural pursuits in Fremont County, Idaho before entering politics.

He would go on to once again serve in the military as a major and lieutenant colonel in the Judge Advocate General’s Department, during the First World War; After his service he would re-locate to Portland, Oregon and practice private law, until 1943, when he retired and moved to Los Angeles, California.