In the 1850 US Census for Union, Broome County, New York the family of Lucas Barnum was enumerated as follows:
Dwelling #3280/326; Family #3406/340
Lucas Barnum, 42, M, Farmer, Real property $1,000, b. New York
Maria Barnum, 32, F, b. New York
Malissa Barnum, 14, F, b. New York, Attended school within the year
Enoch Barnum, 12, M, b. New York, Attended school within the year
Lucy M. Barnum, 9, F, b. New York, Attended school within the year
Silas Barnum, 4, M, b. New York
William Barnum, 2, M, b. New York
Lucas Barnum is mentioned on a memorial in East Maine Cemetery, East Maine, Broome County, New York, United States with a death date of 16 April 1872.