1900 Missouri, St. Louis County, 12th Ward St. Louis, E.D. 195, sheet 12B, page 80, film T623-894
2137 California Avenue, dwelling 186, family 272
McElhose, Henry A., head, white, male, July 1867, age 32, married 9 years, born Wisconsin, father Scotland, mother Germany, armentor, construction co.
------------, Minnie, wife, white, female, August 1869, age 30, married 9 years, mother of 2 children, 1 living, born Illinois, parents born Germany
------------, Irving, son, white, male, Nov 1895, age 4, single, born Missouri, father born Wisconsin, mother Illinois
------------, Charles F., brother, white, male, Sept 1876, age 23, single, born Wisconsin, father Scotland, mother Germany, armentor construction co.

1910 New York, Chautauqua County, 3-ward Jamestown, E.D. 154, sheet 1A, stamped page 246, film T62-929
19 Mechanic Street, dwelling 3, family 3
McElhose, Henry, head, male, white, age 40, married once for 18 yrs, born Illinois, parents Illinois, foreman art metal
------------, Minnie, wife, female, white, age 39, married once for 18 yrs, born Illinois, parents Illinois
------------, Irving, son, male, white, age 14, single, born Missouri, parents born Illinois

1920 New York, Herkimer County, Town of German Flatts?, Village of Ilion, E.D. 13, sheet 13A, stamped page 191
136 Second Street, dwelling 298, family 318
McElhose, Henry, head, male, white, age 51, married, born Wisconsin, father born Scotland, mother born Germany, foreman Japanning, library bureau
------------, Minnie, wife, female, white, age 49, married, born Illinois, parents born Germany
------------, Irving, son, male, white, age 24, single, born Missouri, father born Wisconsin, mother born Illinois, electrical engineer, car co.

1930 New York, Schenectady County, Schenectady City, 11th precinct, block no. 132, E.D. 47-67, S.D. 4, sheet 6B, film T626-1646 (taken 7 April 1930)
1225 Parkwood Blvd., dwelling 128, family 163
MacElhose, Irving K., head, owns house $11000, male, white, age 34, married age 26, born Illinois, parents born Illinois, electrical engineer with power company
--------------, Ruth E., wife, female, age 30, married age 22, born New York, parents born New York
--------------, Martha, daughter, female, white, age 7, single, born New York, father born Illinois, mother born New York
--------------, Jean, daughter, female, white, age 5, single, born New York, father born Illinois, mother born New York
--------------, Mary Lou, daughter, female, age 0? other words, single, born New York, father born Illinois, mother born New York

1940 New York, Schenectady County, Niskayuna, E.D. 47-19, sheet 18A, stamped page 231
R.D. #1, household 402, owns, $12000
MacElhose, Irving H., head, male, white, age 44, married, 5 yrs college, Missouri, lived in same place in 1935, electrical engineer for public utility
-------------, Ruth E., wife, female, white, age 40, married, 4 yrs college, born New York, lived in same place in 1935
-------------, Martha, daughter, female, white, age 17, single, 3 yrs high school, born New York, lived in same place in 1935
-------------, Jean, daughter, female, white, age 15, single, 1 yr high school, born New York, lived in same place in 1935
-------------, Mary Lou, daughter, female, white, age 10, single, 3rd grade, born New York, lived in same place in 1935
Evans, Mary D., mother-in-law, female, white, age 67, widow, 8th grade, born New York, lived in same place in 1935