[6] In 1877, the ill-fated Nolan Expedition crossed the county in search of livestock stolen by Comanche renegades.

The various Indian tribes had moved on by the time of white settlement, due to the depletion of the buffalo herds by hunters.

[8] The county was settled by ranchers such as Ira J. Coulver, J. R. Quinn, Englishman Q.

[8] By 1910 Terry County had 235 farms and 23,000 acres (93 km2) of improved land, with corn being the most important crop.

[8] Terry County lies in the oil-rich north Permian Basin, and the discovery of oil in 1940 quickly led to production.

About 22.10% of all households were made up of individuals, and 12.30% had someone living alone who was 65 years of age or older.

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