In the 1880 US Census for District 138, Columbia, Jennings County, Indiana the family of James T. Barnum was enumerated as follows;
Dwelling #246; Family #250
Barnum, James T.; W; M; 30; Married; Farmer; b. Indiana; Father b. Canada; Mother b. New York
Barnum, Emily J.; W; F; 29; Wife; Married; keeping house; b. Indiana; Father b. Kentucky; Mother b. Indiana
Barnum, Guy C.; W; M; 8; Single; Attended school within the census year; b. Indiana; Both parents b. Indiana