Richard Lee Mountjoy (January 13, 1932 – May 18, 2015) was an American Republican politician from Monrovia, California.

A life member of the Veterans of Foreign Wars, Mountjoy was married to Earline Winnett until her death in 2009.

His political platform fit with that of the conservative wing of the Republican Party: he was anti-abortion, opposed same-sex marriage, and supported both the war in Iraq and possible military intervention in Iran.

On September 22, 2006, the Los Angeles Times reported that a statement in his website's biography, that he served in the Korean War aboard the USS Missouri, was incorrect; ship records later confirmed that he actually served aboard the USS Bremerton.

However, the campaign of the Democratic incumbent, Dianne Feinstein, opined that the error raised enough doubts about Mountjoy's credibility that he was "not qualified to serve the people of California.