Gilbert Ronald Larrieu (born May 23, 1937) is an American long-distance runner.
He competed in the men's 10,000 metres at the 1964 Summer Olympics.
He is the older brother of American 5-time Olympian Francie Larrieu.
Ron ran for Palo Alto High School, winning the 1956 CIF California State Meet in the mile in 4:20.1.
He was ranked #3 in the country that year.
Earlier in the season he broke the 2 mile high school record that had stood for 31 years.
Collegiately he ran for Cal Poly Pomona.He was a two time national champion in cross country, in 1965 and 1966.