Richard Nixon served a total of two terms as President of the United States. However, he only completed one full term in office.
Nixon was first elected in 1968 and took office on January 20, 1969. He was re-elected for a second term in 1972, winning a landslide victory over Democratic candidate George McGovern. However, his second term was cut short when he resigned from the presidency on August 8, 1974, amidst the Watergate scandal. Nixon’s resignation marked the first time a U.S. president stepped down from office to avoid impeachment.
To summarize, Nixon officially served two terms, but he only completed one full term, resigning partway through his second term.