Thomas William Asmussen (September 26, 1878 – August 21, 1963) was a Major League Baseball catcher. Asmussen played for the Boston Doves in 1907. In 2 career games, he had no hits in 5 at-bats. He threw right-handed and it is not known which hand he batted with.
Asmussen was born in Chicago and died in Arlington Heights, Illinois.