Thomas William Asmussen (September 26, 1878 – August 21, 1963) was a Major League Baseball catcher.

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.

This biographical article relating to a United States baseball catcher born in the 1870s is a stub.