Rat Hammer is a rock and roll band from Humboldt Park, Chicago.

In the Summer of 2010, Lucas Price (vocals/guitar) found Mike Hanzelka (drums), Aaron Kramer (bass), and Tom Mooney (guitar). though a bulletin website. In the start of 2012, Aaron left the band and Tom switched to bass. Following a strong DIY ethic and through being part of the Minneapolis network of bands connected by zines and Internet band networks, they eventually came into contact with Merritt Benton, who mixed their 2012 record, Name To Be Determined.