The Jefferson County Courthouse was a building located in Rigby, Idaho listed on the National Register of Historic Places.
It was one of three nearly identical courthouses designed by Sundberg & Sundberg for 1938 Works Progress Administration projects, the other two being the Jerome County Courthouse and the Oneida County Courthouse. All are two-story buildings with five-bay fronts and have elaborate terra cotta entries.
The building was demolished March 15, 2016.