In the 1850 US Census for Carlton, Barry, Michigan the family of Isaac Barnum was enumerated as follows:
Household #837; Family #856
Barnum, Isaac; 37; M; Farmer; real estate value $1,000; b. N York
Barnum, Roxany; 49; F; b. N York; unable to read or write
Barnum, Eligah; 22; M; Farmer; b. N York
Barnum, John; 20; M; Laborer; b. N York; attended school during the previous year
Barnum, Loisa; 19; F; b. N York; attended school during the previous year
Barnum, Albert; 15; M; Laborer; b. N York; attended school during the previous year
Barnum, Hannah O; 14; F; b. N York; attended school during the previous year
Barnum, Malvina; 11; F; b. N York; attended school during the previous year
Barnum, Andrew; 8; M; b. N York
Barnum, Sarah E; 6; F; b. Mich
Barnum, Henry; 25; M; Farmer; b. N York
Isaac died of "apoplexy". He was a shoemaker at the time of his death.