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.
[1] As of the 2000 U.S. Census, 501,307 people had the surname Walker, making it the 28th most common surname in America.
[2] It is the 14th most common surname in Australia, with 26,688 people as of 2007.
[3]