Yoakum County, Texas: History
=== Native Americans ===
Early tribes included Suma-Jumano, Comanche, Cheyenne, and Kiowa.
The Comanches and Indians before them knew that the sand dunes that one can still see today called the Lea-Yoakum Sand Dunes and those visible around Denver City did not signify a desert. Instead, these dunes are remnants of an ancient river system that once flowed northwest to southeast through the area. Indians knew to dig beneath the surface of the sand dunes to find water, so they frequented the sand dunes to hunt the plentiful game once there, and perform sacred rites during their encampments. Evidence of these visits to the area by Comanche, Kiowa, and prehistoric Indians before them was discovered in the 20th century by local ranchers and verified by archaeologists.
A Quanah Parker Trail arrow, installed December 14, 2011, marked Denver City as a place with historic ties to the Comanche and other native peoples who once hunted and lived in the region. In March 2015, Denver City removed and stored the arrow for eventual reinstallation at the site of a new museum.
The Texas Legislature established Yoakum County from Bexar County in 1876. The county was organized in 1907, and Plains became the county seat. In 1900, the area had only 26 residents. One ranch in the county that year was devoted to cattle, rather than crops.
Sale of state land after 1900 brought an increase in population. By 1910, 107 farms or ranches were in the area, and the population had increased to 602.
By 1920, 109 ranches or farms in the area, but the population had fallen to 504. More than 21,000 cattle were reported that year, but crop cultivation remained limited; about 2,200 acres (8.9 km2) were planted in corn, 600 in sorghum, and 47 in cotton. During the 1920s, the county experienced a minor expansion of crop farming, and cotton became the most important crop; by 1930, over 10,000 acres (40 km2) were devoted to cotton. There were 239 farms, and the population had increased to 1,263.
The first oil well in the county gushed in 1935. Denver City benefited with a resulting boom economy. By January 1, 1991, almost 1,664,036,000 barrels (264,560,600 m3) of oil had been taken from county lands since 1936.
Irrigation in the county led to more acres being planted on sorghum, cotton, alfalfa, watermelons, and castor beans. In 1982, 93% of the land in Yoakum County was in farms and ranches, and 44% of the farmland was under cultivation. Some 110,000 acres (450 km2) were irrigated. About 95% of agricultural revenue was derived from crops, especially cotton, sorghum, wheat, hay, and corn.