[5] Archer County is part of the Texas Red Beds, which are strata of red-colored sedimentary rock from the Early Permian.

[6] The fossils of Permian-period vertebrates in the Texas Red Beds were first discovered by Edward Drinker Cope in 1877.

The Seymour Division consists of 34,000 acres (14,000 hectares), which formerly was known as the Cross Bar Ranch when it was owned by the Claude Cowan Sr. Trust.

The ranch was purchased in January 2005 by the Gerald Lyda family and La Escalera Limited Partnership, and is managed by partner Jo Lyda Granberg and her husband K. G. Granberg of Seymour.

Joseph Sterling Bridwell, a Wichita Falls philanthropist and oilman, also owned a ranch in Archer County.

The two southeastern Archer County cities of Scotland and Windthorst have 37 functioning dairy farms nearby as of 2019.

Every dairy farm in the Scotland/Windthorst area is family owned, and this is from where most of the economy of the two cities derives.

Archer County is heavily Republican, and has voted for the presidential candidate of that party in every election since 1980.