Dr. Gregory Larson did his undergraduate work at Dakota State College and Sioux Falls College, earning his Bachelor of Science degree. He enhanced his education by attending the University of South Dakota School of Medicine for his medical degree, which he completed in 1990. Sioux Valley and McKennan Hospitals in Sioux Falls were the sites for his internship with Sioux Falls Family Practice Center, where he also completed his residency. He is board-certified with the American Board of Family Practice.

Dr. Larson and his wife, Robin, live in Watertown. When not keeping up with his busy work schedule, he enjoys playing the guitar, flying, doing carpentry work, and hunting.