Dr. Costen was born on October 10, 1832 in Somerset County. Maryland, the son of William and Rosa Taylor Costen. He was educated at Washington Academy in Princess Anne and received his medical degree from Penn Medical College in Philadelphia in 1857.At the time he was elected mayor of Pocomoke City in 1888, Dr. Costen had already served fifteen years on the Democratic State Central Committee. He had been elected to the Maryland State Legislature in 1881, where he served only one term. He was a trustee of Pocomoke High School and an Elder and Trustee of Pitts CreekPresbyterian Church. He served two terms as mayor, 1888-1892 and in 1908 was again elected mayor to serve two more terms. Dr. Costen died at his home on April 1, 1931.
206 Market Street