Social Security Administration Changes Visits to St. Marys County. Effective in January, representatives from the Social Security Administration (SSA) will reduce their number of visits to St. Marys County to one Wednesday a month. Representatives will be available on the second Wednesday of each month from 9 a.m. to 2 p.m. at the College of Southern Marylands Leonardtown Campus, A Building, Auditorium, Room A206, 22950 Hollywood Road, Leonardtown, Md. 1-800-772-1213.