Allison Kieffer (born September 16, 1987) is an American athlete who competes in distance running events as a professional runner for Oiselle. Kieffer placed 5th in 2:29:39 at the 2017 New York City Marathon. She placed 7th at the 2018 New York City Marathon with a time of 2:28:12. Kieffer is a coach and nutritionist.
Kieffer joined the New York Athletic Club and ran with Princeton Tigers All-American Sarah Cummings. She placed sixth with a time of 20:14.2 at the 2010 USATF National Club Cross Country Championships in Charlotte, North Carolina. Kieffer qualified to represent Team USA at the 2011 NACAC Cross Country Championships.
At the 2011 NACAC Cross Country Championships' 6 km race at Port of Spain, Trinidad and Tobago, Keiffer placed fourth with a time of 20:29.6 behind Team USA teammates Kim Conley, and Megan Duwell and champion Kathryn Harrison. The US team took home gold medals.