1880 U.S. Census, Baltimore City, Maryland
18th Ward, Enumeration District 169, Sheet 13
360 Sharp Street
Dwelling 1, Family 2
Kopp, Frederick, white, male, 25, married, works “In Guano Factory”, born in Maryland, both parents born in Prussia
Kopp, Annie, white, female, 24, wife, married, keeping house, born in Pennsylvania, father born in Prussia, mother born in Pennsylvania
Kopp, Charles, white, male, 1, son, single, born in Maryland