Information collected during censuses taken every ten years. Includes social statistics providing information on social, cultural, and religious life for 1850-1880; mortality listings of those who died in the census year along with their occupation and cause of death for 1850-1880; manufacturers' annual productions for 1850-1880; agricultural productions for 1850-1880; population schedules, providing information on inhabitants for all years except 1890; a listing of defective, dependent, and delinquent individuals for 1880; a 1890 listing of union veterans and their widows including dates of service and disabilities suffered; and slave schedules for 1850 and 1860. Arranged by subject within each census year; population statistics are divided by county and enumeration district. Population schedules indexed by published indexes, 1790-1860 and 1890, and Census Record, MD, Index series, 1880, 1900, and 1920.