1850 census of Morgan Co., Ky, p. 133, records as family #630:
John Dehart, 38; Nancy, 35; James, 8; Martha, 7; Susan, 4; John, 2.
John Sr. born in Virginia, all others in Kentucky.

1860 census of Morgan Co., Ky, West Liberty, enumerated 19 July, lists on p. 82 as family #508/503:
John Dehart, 48, farmer; Nancy, 42; James, 19; Martha, 16; Sussanah, 14; John R., 11; Hazelgreen, 10; William P., 8; Allen, 5; Sarrah, 1. John born in Virginia, all others in Kentucky.

1870 census of Johnson Co., Ky, Paintsville precinct, enumerated 26 July, lists on p. 36 as family #245/246:
Dehart, John, 58, turning cading mechine (?), b. Va; Nancy, 52, b. Ky; John R., 24; Susan, 22; William P., 18; Allen B. S., 15; Sarah, 11. All children born in Ky.

1880 census of Elliott Co., Ky, Martinsburg precinct, lists as family #109:
DeHart, John Sr., 68, farmer, Va Va Va; Nancy, 63, wife, Ky Ky Ky; Susan, 34, dau, single, Ky Va Ky; John R., 32, son, Ky Va Ky; Sarah, 27, dau, single, Ky Va Ky.

Sarah should be only 21.

(Neighboring households include his son Hazel Green at #107, his son James W. at #108, his son Wm. P. at #111, his son Allen at #121, and his brother Stephen at #106.)