In the 1850 US Census for Harmony, Rock County, Wisconsin Lewis Barnum was enumerated with the family of Cornelius Miller, as follows:
Household #290; Family #290
Lewis Barnum, 22, M, Laborer, b. New York
In the 1860 US Census for Eastman, Crawford County, Wisconsin the family of Lewis Barnum was enumerated as follows:
Household #744; Family #706
Louis C. Barnum, 32, M, Farmer, Personal property $40 b. New York
Elcy M. Barnum, 28, F, b. New York
Ella Barnum, 6, F, b. New York
In the 1880 US Census for Vernon Township. Palo Alto County, Iowa the family of Lewis BARNUM was enumerated as follows:
Household #184; Family #189
Barnum, Lewis C.; W; M; 52; M; Farmer; b. N.Y.; father b. Mass.; mother b. Mass.
Barnum, Elsie M.; W; F; 49; Wife; M; Keeping House; b. N.Y.; father b. N.Y.; mother b. N.Y.
Barnum, Effie G.; W; F; 18; Daughter; S; b. Wis.; father b. N.Y.; mother b. N.Y.
Barnum, Lulu; W; F; 14; Daughter; S; b. Wis.; father b. N.Y.; mother b. N.Y.
In the 1900 US Census for Vernon Township. Palo Alto County, Iowa the family of Lewis BARNUM was enumerated as follows:
Household #214; Family #217
Barnum, L. C.; Head; W; M; b. May 1828; 72; M; married 48 years; b. New York; father b. Connecticut; mother b. Connecticut; can read, write and speak English; lives in non-farm home
Barnum, Elsie; Wife; W; F; b. Dec 1830; 69; M; married 48 years; mother of 4 children; 2 living; b. New York; father b. New York; mother b. New York; can read, write and speak English
Griggs, E. S.; Son-in-Law; W; M; b. Feb 1861; 39; M; married 8 years; b. Illinois; father b. Connecticut; mother b. Pennsylvania; Farmer; employed full year; can read, write and speak English; rents farm; Farm Schedule 208
Griggs, Lulu; Daughter; W; F; b. Feb 1866; 34; M; married 8 years; mother of 2 children; 2 living; b. Wisconsin; father b. New York; mother b. New York; can read, write and speak English
Griggs, Herbert; Grandson; W; M; b. Aug 1898; 1; S; b. Iowa; father b. Illinois; mother b. Wisconsin
Griggs, Baby; Grandson; W; M; b. May 1900; 0 [less than 1 month old]; S; b. Iowa; father b. Illinois; mother b. Wisconsin
Gresty, Lewis; Grandson; W; M; b. May; 1895; 5; S; b. Iowa; father b. England; mother b. Wisconsin
Mart, Kate; Employee; W; F; 26; S; b. Germany; father b. Germany; mother b. Germany; immigrated 1879; 21 years in US; Servant; can read, write and speak English