William Martin Croll (April 9, 1866 – October 21, 1929) was a Democratic member of the U.S. House of Representatives from Pennsylvania. William M. Croll was born in Upper Macungie Township, Pennsylvania. He attended Keystone State Normal School in Kutztown, Pennsylvania, and graduated from the Eastman Business College in Poughkeepsie, New York. During World War I, from 1913 to 1918, he served as naval officer at the port of Philadelphia. He was a delegate to the Democratic National Conventions in 1912 and 1920.