William Sidney "Sid" Hatfield (May 15, 1891 or 1893 – August 1, 1921), was Police Chief of Matewan, West Virginia during the Battle of Matewan, a shootout that followed a series of evictions carried out by detectives from the Baldwin-Felts Detective Agency.
William Sidney Hatfield was born in 1890 or 1893 during the fifth month of the year.