3,276 documented Olson ancestors, drawn from public records such as death indexes and county histories. Every name below is a real person in the public record.
Scandinavian patronymic — 'son of Ole' (Olaf).
Where the records place them: Iowa (100%), out of 3,268 Olson records with a known place.
The most common first names among them: Carl, Robert, John, Mary and Clarence.
Of the 3,263 with both a birth and a death year, the median lifespan was 79 years.
The earliest recorded birth is John Olson, born 1839 in Sweden.
Documented Olson families on this page come from History of Marshall County, Kansas (1917), History of Goodhue County, Minnesota (1909) and History of McHenry County, Illinois (1922).
Real Olson family groups pieced together from the public record — parents, spouse, and children, each with the source that proves it. Recognize your line? Tap a family and we’ll start your documented tree from it.
Deceased Olson ancestors, earliest first. Living family members are deliberately omitted.
Found your Olson? We trace the whole line — both sides, back to the documented wall — into a written book & interactive family site. No DNA test; a free call before you spend a dollar.
Scandinavian patronymic — 'son of Ole' (Olaf).
The documented line here reaches back to 1839. Most Olson lines can be traced to the end of the surviving public record.
No. Deceased ancestors only, from public records. Living people are excluded for privacy.
If a name here matches your family, it may well be. A full documented build confirms exactly how your line connects.
Part of a network of documented family histories: