Knickerbocker is an unincorporated community in southwestern Tom Green County, Texas, United States.

[3] Named for Washington Irving's character Diedrich Knickerbocker by early settlers related to Irving, the community quickly became significant, being the most important community in the county aside from San Angelo.

Agriculture was long the community's mainstay, between grain farming and sheep ranching.

Knickerbocker Ranch was established in 1877 when Joseph Tweedy, E. Morgan Grinnell, Lawrence Leslie Grinnell, and Joel Barlow Reynolds drove Mexican sheep into the valley from their camp near Fort Clark.

In 1882, at the invitation of George Ward Holdrege, Joel Barlow Reynolds (father of Samuel W Reynolds) moved to Nebraska to help expand the Burlington and Missouri River Railroad Company throughout the northern Great Plains states.