| Birth | about 1830 | John P. Kirby was born about 1830 in Tennessee. |
| Marriage | | He and Miriam Medcalf were married. |
| 1870 Census | 20 Jul 1870 | John P. Kirby appeared as head of household in the 1870 Federal Census of Lassater, Hamilton County, Illinois, as John Kirby. Living with him was his wife, Miriam, and their children, Jessie, James, William and August. |
| 1880 Census | 14 Jun 1880 | John P. Kirby appeared as head of household in the 1880 Federal Census of Lassater, Hamilton County, Illinois. Living with him was his wife, Miriam, and their children, Jessie, William, August, John and R. |
1910 Census
| 28 Apr 1910 | John appeared in the 1910 Federal Census of Castor, Stoddard County, Missouri, as John P. Kirby, in the household of Alnestena and William Alvin Kirby. He is a widowed white female, age 80. Father of head of household. He was born in Tennessee. His father was born in Illinois, his mother in Missouri. He can speak English. He has no occupation. |
John P. Kirby