Paul Michael Hartloff (born April 5, 1958) is an American former competition swimmer who represented the United States at the 1976 Summer Olympics in Montreal, Quebec.

Hartloff competed in the men's 1,500-meter freestyle event, but in a highly competitive year finished seventh in the final.

Hartloff was a Channel League Conference Champion in the 4x100-meter freestyle event with a combined time of 3:15.6 and had been swimming with two of the San Marcos High relay team members since they were eight.

[9] Swimming around the age of 17, in one of his more significant performances, Hartloff took a silver in the 1500-meter freestyle at the October, 1975 Pan American Games in Mexico City with a time of 15:57.32.

[3] Brian Goodell won the event in a blazing fast 15:02.4, setting a new world record and a personal best time by 4 seconds.

Bobby Hackett of the USA was second and Steve Holland of Australia third, both finishing the event in times under the standing World Record.

[19] In 1979, Hartloff held a top time for Stanford in the 1650 and the 500 freestyle with a 4:27.70, but was second to Olympic gold medalist Mike Bruner who had swum the event in 4:26.10.