20. Stimson family
> Land area: 552,000 acres
> Roughly equal to: One-third the size of Delaware
Founded by Thomas Douglas Stimson, the Stimson Lumber Company, which today operates out of the Pacific Northwest, has remained in the family for six generations. Today, the Stimson family owns 552,000 acres, primarily in Montana and Oregon.
19. Martin family
> Land area: 570,000 acres
> Roughly equal to: Six-and-a-half times larger than Detroit
The Martin family, owners of the nearly 100 year old RoyOMartin Lumber Company, have over half a million acre of land, largely in Louisiana.
18. Ford family
> Land area: 580,000 acres
> Roughly equal to: Two-and-a-half times larger than Indianapolis
The descendants of the late Kenneth Ford own 580,000 acres primarily in Oregon. Ford made a career in the timber business during the Great Depression.
17. Thomas Peterffy
> Land area: 581,000 acres
> Roughly equal to: Twice the size of San Antonio, Texas
Thomas Peterffy arrived in the United States as a refugee from Hungary in 1965. Peterffy made a fortune as a successful investor and innovator on Wall Street. He became one of the largest landowners in the United States when he purchased 561,000 acres of land in northern Florida for $700 million in 2015.
16. O’Connor heirs
> Land area: 587,800 acres
> Roughly equal to: Seven times the size of Philadelphia
Heirs of the late Thomas O’Connor, who immigrated to the United States from Ireland in the 1800s, own over half a million acres, including the O’Connor Ranch in south Texas. The family patriarch owned half a million acres in Texas, and the family fortune grew considerably when his son discovered oil on family land.