William Eugene Sutphin Trowbridge (October 13, 1832 - c. 1920) was a Chicago-based artist and illustrator active in the second half of the 19th century. Trowbridge was born in Danbury, Connecticut but was active in Rockville, Illinois, then Chicago from 1872. He appears through this period in various Chicago directories as an artist, sign painter, real estate agent, clerk, and secretary. In the 1880s he was a partner with Charles E. Petford (1854 - 1920) in the graphic design firm 'Trowbridge and Petford'.