Mike Crapo graduated from Brigham Young University in 1973 with a degree in Political Science. He received his Juris Doctor from Harvard Law School in 1977. Crapo served in Idaho's State Senate from 1984-1992. From 1993-1998, he represented Idaho's 2nd District in the U.S. House of Representatives.

Mike Crapo assumed his U.S. Senate seat in 1999.