William L. Blaser (December 10, 1923–February 26, 2018) was an American businessman and politician.
He served in the United States Navy during World War II.
Blaser graduated from Northwestern University and went to Harvard Law School.
Blaser served in the Illinois House of Representatives from 1965 to 1967 and was involved with the Republican Party.
Blase was elected as an at-large representative due to problems with reapportionment of the Illinois General Assembly.