Danville is an unincorporated community and census-designated place in Allegany County, Maryland, United States. As of the 2010 census it had a population of 271. Danville is located along U.S. Route 220, 14 miles southwest of Cumberland, and 6 miles northeast of Keyser, West Virginia. The community lies in a valley bounded by 2,800-foot Dans Mountai…Danville is an unincorporated community and census-designated place in Allegany County, Maryland, United States. As of the 2010 census it had a population of 271. Danville is located along U.S. Route 220, 14 miles southwest of Cumberland, and 6 miles northeast of Keyser, West Virginia. The community lies in a valley bounded by 2,800-foot Dans Mountain to the northwest and 1,500-foot Fort Hill to the southeast.