In the 1840 US Census for Chateaugay, Franklin County, New York, Platt Barnum and his family were enumerated as follows:
Free White Persons - Males - 5 thru 9: 2; Free White Persons - Males - 30 thru 39: 1; Free White Persons - Females - Under 5: 2; Free White Persons - Females - 30 thru 39: 1; Persons Employed in Manufacture and Trade: 1; Free White Persons - Under 20: 4; Free White Persons - 20 thru 49: 2; Total Free White Persons: 6; Total All Persons - Free White, Free Colored, Slaves: 6.
In the 1850 US Census for Burke, Franklin, New York, the family of Platt Barnum was enumerated as follows:
Platt Barnum, 40; Doctor Barnum, 20; Margetta Barnum, 14; Hannah Barnum,7
Wisconsin, Compiled Census and Census Substitutes Index, 1820-1890. Name: Platt Barnum; State: WI; County: Grant County; Township: Fennimore; Year: 1855; Page: 006; Database: WI 1855 State Census Index.
In the 1860 US Census for Fennimore, Grant County, Wisconsin, Platt Barnum was enumerated with the family of his son Doctor F. Barnum, as follows:
Dwelling #306; Family 306
D. F. Barnum, 26, Male, Farmer, Real property $1,500, Personal property $200, b. New York
Derinda Barnum, 27, Female, b. Vermont
Hannah N. Barnum, 3, Female, b. Wisconsin
Ell Franklin Barnum, 1, Male, b. Wisconsin
Platt Barnum, 58, Male, Farmer, Real property $3,500, Personal property $500, b. Vermont
Note: George P. Barnum, another son of Platt, and George's wife Mary were enumerated next door, in Dwelling #305