Jeffrey Eggleston (born October 1, 1984) is a professional American distance runner who specializes in the marathon. He has represented the U.S. at three World Championship Marathons in 2011, 2013 and 2015. At the 2013 WC Marathon in Moscow, he led the U.S. team with a 13th place finish. He set his personal best of 2:10:52 at the 2014 Gold Coast Marathon in Australia.

Jeffrey has recorded marathon victories at Pittsburgh (2011), The Woodlands (2012), Lima (2017) and San Diego (2017). He has held 2nd place podium spots at the U.S. Marathon Championship (2010), Pittsburgh (2012) and Gold Coast (2014). He is a 3-time winner of the Rock ‘n’ Roll Las Vegas Half Marathon (2014, 2015 and 2017) . In 2014, he won the Rock ‘n’ Roll Half Marathon Series Grand Prix.

Jeffrey is self-coached and lives and trains in Boulder, Colorado. He is sponsored by adidas.

Personal bests:
Marathon- 2:10:52
1/2 Marathon- 1:02:41
10K- 28:34