Bartłomiej "Bartosz" Kizierowski (born 20 February 1977) is a freestyle who represented Poland in four consecutive Summer Olympics, starting in 1996.

Kizierowski began his career as a backstroke swimmer, but changed to freestyle in the mid-1990s.

Kizierowski trained at The Race Club, a swimming techniques training club founded by Olympic Swimmers Gary Hall, Jr. and his father, Gary Hall, Sr.

He lives and studies in the United States, at the University of California, Berkeley.

He is a 1996 Graduate of Mission Viejo High School, where he swam for Coach Mike Pelton.