The Word Formation is a geologic formation in Texas.

[1] It preserves fossils dating back to the Permian period.

It is probably named for the Old Word Ranch in the Glass Mountains of Brewster County.

[2] The Wordian age of the Permian Period is named for the Word Formation.

[3] The formation is subdivided into three members, from young to old: The limestone formation contains marine gastropods, brachiopods and ammonites.