Elmer "Mousey" Alexander (June 19, 1922 – October 9, 1988) was an American jazz drummer.

[1][2] He grew up in Chicago,[3] eventually studying at the Roy C. Knapp School of Percussion located there.

[4] Prior to serving in the Navy during World War II,[3] Alexander backed up different performers at Chicago jazz clubs, including the singer Billie Holiday.

In the middle of the 1950s, he played and recorded with the Sauter-Finegan Orchestra and with guitarist, Johnny Smith.

He also played with Charlie Ventura, Red Norvo, Clark Terry, Ralph Sutton, Sy Oliver, and Doc Severinsen.