William Andrew Swanson (October 12, 1888 – October 14, 1954) was an infielder in Major League Baseball. Listed at 5 ft 6 in (1.68 m), 156 lb., Swanson batted and threw right-handed. He was born in New York, New York.

Swanson played briefly for the 1914 Boston Red Sox as a reserve infielder for Steve Yerkes (2B), Larry Gardner (3B) and Everett Scott (SS). He went 4-for-20 for a .200 batting average in 11 games, including two doubles and a .304 on-base percentage, and never appeared in a major league game again.

Swanson died in his hometown of New York, just two days after his 66th birthday.