Thomas Spencer Crago (August 8, 1866 – September 12, 1925) was a Republican member of the U.S. House of Representatives from Pennsylvania. Thomas S. Crago was born in Carmichaels, Pennsylvania. He attended Greene Academy and Waynesburg College. He graduated from Princeton College in 1893. He studied law, and was admitted to the bar of Greene County, Pennsylvania in 1894 and commenced practice in Waynesburg, Pennsylvania. He died in Waynesburg, aged 59, and interred in Green Mount Cemetery.