Which us president served two non-consecutive terms?

(Stephen) Grover Cleveland is the only US president to serve non consecutive terms. He served as the 22nd and 24th President of the United States. His first term of office ran from 1885 to 1889. He was defeated by Benjamin Harrison in 1888 and then defeated Harrison in 1992 and so served again 1893-1897.

Grover Cleveland he was president before and after Benjamin Harrison.

Also, although all of Franklin Delano Roosevelt's terms were consecutive, he technically served two nonconsecutive terms -- his first term and third term were not consecutive.