Irvin Branch is a long 1st order tributary to Anderson Creek in Clearfield County, Pennsylvania. Irvin Branch is classified as a coldwater fishery (CWF) and contains a population of Brook Trout. Some mining has occurred in the headwaters of the stream, but it is not considered impaired by it.
Irvin Branch rises about 5 miles north of Greenville, Pennsylvania, and then flows southeast to join Anderson Creek about 0.5 miles northeast of Greenville.
Irvin Branch drains of area, receives about 45.1 in/year of precipitation, has a wetness index of 377.55, and is about 97% forested.