| Birth Date: | August 22, 1896 |
| Birth Place: | Saint Paul, Minnesota, United States |
| Death Date: | April 4, 1971 (aged 74) |
| Death Place: | New Port Richey, Florida, United States |
| Height: | 1.88m (06.17feet) |
| Sport: | Athletics |
| Event: | 400 m hurdles |
| Club: | Chicago AA |
| Pb: | 400 mH – 54.0 (1920) |
| Show-Medals: | yes |
Frank Farmer Loomis Jr. (August 22, 1896 - April 4, 1971) was an American athlete, winner of 400 m hurdles at the 1920 Summer Olympics in Antwerp.[1] His brother, Jo Gilbert Loomis, was a substitute sprinter at the same Olympics.
Loomis went to school in Evanston until 1914. Upon meeting his future Oregon High School teammate Sherman Landers, he transferred to Oregon, Illinois, to continue training with him. Together, they began a rise that would take them to the 1920 Olympic Games. Although Loomis was an AAU champion in 220yd hurdles in 1917 and 1918 and in 440yd hurdles in 1920, the main favorite in Antwerp was John Norton, who had run a new world record of 54.2 just two months before the Olympics. Despite that, Loomis won the 400 m hurdles final easily in a new world record of 54.0, beating Norton to second place by 0.6 seconds.
Landers-Loomis Field in Oregon, Illinois, is named partially in his honor.