How many terms did Lyndon Johnson serve as president?

Andrew Johnson, the 17th President of the United States, took office the day President Lincoln died; he serving the remaining term: April 15, 1865 - March 4, 1869, and was not elected for a second term.

Lyndon B. Johnson, the 36th President of the United States, took office the day President John F. Kennedy died, serving the remaining term: November 22, 1963-January 19, 1964. He was elected for a second term, which he served from January 20, 1964-January 19, 1969.