John Daniel Johnston was born 10 May 1810 in Elizabethtown, Hardin County, Kentucky to Daniel Johnston (1782-1816) and Sarah Bush (1788-1869) and died 20 September 1860 Muddy, Saline County, Illinois of unspecified causes. He married Mary Barker (1816-1850) 16 October 1834 in Coles County, Illinois. He married Nancy Jane Williams (1836-) 5 March 1851 in Coles County, Illinois.
Family Heritage
When he was 8 years old his widowed mother, Sarah Bush (1788-1869), married the father of future US President Abraham Lincoln (1809-1865) and their two families merged together.
Children
| Name | Birth | Death | Joined with |
| Abraham Lincoln Barker Johnston (1836-) | |||
| Thomas Lincoln Davis Johnston (1837-) | |||
| Marietta Sarah Jane Johnston (1840-1893) | |||
| Squire H Johnston (1841-) | |||
| Richard M Johnston (1843-) | |||
| Dennis Friend Johnston (1845-) | |||
| James F Johnston (1845-) | |||
| Daniel W Johnston (1847-1849) | |||
| Name | Birth | Death | Joined with |
| John D Johnston (1854-) | |||
Siblings
| Name | Birth | Death | Joined with |
| Sarah Elizabeth Johnston (1806-1864) | 1 June 1806 Elizabethtown, Hardin County, Kentucky | 18 December 1864 Charleston, Coles County, Illinois | Dennis Friend Hanks (1799-1892) |
| Matilda Johnson (1809-1878) | 1809 Elizabethtown, Hardin County, Kentucky | 20 February 1878 Charleston, Coles County, Illinois | Squire Levi Hall (1805-1851) |
| John Daniel Johnston (1810-1860) | 10 May 1810 Elizabethtown, Hardin County, Kentucky | 20 September 1860 Muddy, Saline County, Illinois | Mary Barker (1816-1850) Nancy Jane Williams (1836-) |