Walker is an English and Scottish surname.
With over 150,000 bearers in England in 2014, Walker was the 14th most common surname in that country. As of the 2000 U.S. Census, 501,307 people had the surname Walker, making it the 28th most common surname in America. It is the 14th most common surname in Australia, with 26,688 people as of 2007.