Stephen Longfellow IV was born 23 March 1776 in Gorham, Cumberland County, Maine to Stephen Longfellow (1750-1824) and Patience Young (1745-1830) and died 3 August 1849 Portland, Cumberland County, Maine of unspecified causes. He married Zilpah Wadsworth (1778-1851) 1804 in Duxbury, Plymouth County, Massachusetts.
Children
| Name | Birth | Death | Joined with |
| Stephen Longfellow (1805-1850) | |||
| Henry Wadsworth Longfellow (1807-1882) | 27 February 1807 Portland, Cumberland County, Maine, United States | 24 March 1882 Cambridge, Middlesex County, Massachusetts, United States | Mary Storer Potter (1812-1835) Frances Elizabeth Appleton (1817-1861) |
| Elizabeth Wadsworth Longfellow (1808-1829) | |||
| Anne Wadsworth Longfellow (1810-1901) | |||
| Mary Longfellow (1816-1902) | |||
| Ellen Longfellow (1818-1834) | |||
| Samuel Longfellow (1819-1892) | |||
| Alexander Wadsworth Longfellow (1814-1901) | |||
Siblings
| Name | Birth | Death | Joined with |
| Tabitha Longfellow (1774-1807) | |||
| Stephen Longfellow (1776-1849) | 23 March 1776 Gorham, Cumberland County, Maine | 3 August 1849 Portland, Cumberland County, Maine | Zilpah Wadsworth (1778-1851) |
| Moses Longfellow (1777-) | |||
| Abigail Longfellow (1779-1869) | |||
| Ann Longfellow (1781-1781) | |||
| Catherine Longfellow (1786-1804) | |||
| Samuel Longfellow (1789-1818) | |||
| Child Longfellow (1792-1792) | |||