Sheffield is a city in Colbert County, Alabama, United States, and is included in The Shoals metropolitan area. As of the 2010 census, the population of the city was 9,039. Sheffield is the birthplace of "country-soul pioneer" and songwriter Arthur Alexander, French horn player Willie Ruff, notable attorney, actor, former senator and presidential contender Fred Thompson, Watergate committee U.S. Senator Howell Heflin and U.S.