Bigler is a census-designated place located in Bradford Township, Clearfield County in the state of Pennsylvania. As of the 2020 census, the population was 356. Its location is 9 miles east of Clearfield and 8 miles northwest of Philipsburg on U.S. Route 322. Bigler was originally known as Williams Grove, but was renamed because the mail was being confused with another Williams Grove, in Cumberland County.