Democratic congressman John Olver of Massachusetts says he will retire at the end of his term.

The 75-year-old congressman announced on Wednesday that he would step down from his western Massachusetts seat because of family circumstances. His wife is ill with cancer.

Olver's decision comes as Massachusetts officials wrestle with a redistricting process that will reduce the state's congressional seats from 10 to nine.

Olver has held his seat since 1991 and was a member of the House Appropriations panel. He is a former college professor.