See also: milling English Proper noun Milling (plural Millings) A surname. Statistics According to the 2010 United States Census, Milling is the 23725th most common surname in the United States, belonging to 1067 individuals. Milling is most common among White (75.35%) and Black/African American (20.71%) individuals. Anagrams gin mill, ginmillWikiwand - on Seamless Wikipedia browsing. On steroids.