1900 USCensus, Ohio, Franklin, Columbus, Ward 8, District 76, 12 June, 1900, 529 Rhodes Avenue
Ruhl, John, head, age 38, married 11 years, born in Germany, parents born in Germany, entered US in 1891, naturalized, Carpenter
Katherine, wife, age 35, married 11 years, born in Germany, parents born in Germany, entered US in 1891, 7 children, 4 living
John Jr., son, age 8, born in Germany, parents born in Germany, entered US in 1891
Otto, son, age 7, born in Ohio, parents born in Germany
August, son, age 6, born in Ohio, parents born in Germany
Katherine Jr., dau, age 3, born in Ohio, parents born in Germany

1910 USCensus, Ohio, Franklin, Clinton, District 6, 30 April, 1910
Ruhl, John, head, age 48, married 23 years, born in Germany, parents born in Germany, entered US in 1892, naturalized, laborer on railway
Katherine, wife, age 45, married 23 years, born in Germany, parents born in Germany, entered US in 1892, naturalized, 10 children, 7 living
John Jr., son, age 18, born in Germany, parents born in Germany, entered US in 1892, naturalized, laborer in machine shop
Otto, son, age 17, born in Ohio, parents born in Germany, laborer
August, son, age 16, born in Ohio, parents born in Germany
Katherine Jr., dau, age 13, born in Ohio, parents born in Germany
Elizabeth, dau, age 9, born in Ohio, parents born in Germany
Charles, son, age 6, born in Ohio, parents born in Germany
Arthur, son, age 4, born in Ohio, parents born in Germany

1920 USCensus, Ohio, Franklin, Clinton, District 6
Ruhl, John, head, owner, age 58, born in Germany, parents born in Germany, entered US in 1892, naturalized 1893, track repair on railroad.
Catherine, wife, age 54, born in Germany, parents born in Germany, entered US in 1892, naturalized 1893
Otto, son, age 27, born in Ohio, parents born in Germany
Elizabeth, dau, son, age 19, born in Ohio, parents born in Germany
Charles, son, age 16, born in Ohio, parents born in Germany
Arthur, son, age 13, born in Ohio, parents born in Germany
Florence, dau, age 8, born in Ohio, parents born in Germany

1930 USCensus, Ohio, Franklin, Columbus, District 149, 1419 25th Ave., April 5, 1930
Ruhl, John, head, age 69, age at first marriage 27, born in Germany, parents born in Germany, entered US in 1892, owned home
Kathryn, wife, age 65, age at first marriage 23, born in Germany, parents born in Germany, entered US in 1892
Zoog, Edgar W. son-in-law, age 22, age at first marriage 21, born in Ohio, father born in France, mother born in Ohio
Florence I., daughter, age 19, age at first marriage 18, born in Ohio, parents born in Germany

Not found in SSDI.