[2] The county is named for George Bernard Erath, an early surveyor and a soldier at the Battle of San Jacinto.

Erath County is the location of two of North America's largest renewable natural gas plants.

[4] The Anadarko became entangled with the French battles with the Spanish and later the Anglos and suffered the consequences, including diseases from which they had no immunity.

Jones had many children who went on to populate the county with names still enduring today such as Barbee, White, Durham, and Brambeletts.

Dublin later became famous as the early boyhood home of the PGA, U.S. Open and Masters golf champion Ben Hogan.

The group included brothers William F. and John M. Stephen and a black family whose name and destiny is unknown.

By 1910, soil erosion and the boll weevil caused diversity planning that led to dairy farms, fruit orchards, nurseries, peanuts, feed crops and poultry.

The architects James Riely Gordon and D. E. Laub designed the present three-story showcase Victorian structure.

In addition to Erath, Gordon designed the Arizona State Capitol, and courthouses in Aransas, Bexar, Brazoria, Comal, Ellis, Fayette, Gonzales, Harrison, Hopkins, Lee, McLennan, Victoria and Wise counties.

The interior is east Texas pine, with cast and wrought-iron stairways, and tessellated imported marble floors.

Five radio stations have their main studios and offices in Erath County: KEQX 89.5, KTRL 90.5, KSTV-FM 93.1, KXTR-LP 100.7 and KSTV (AM) 1510.

Several scenes in the Paul Greengrass Western movie News of the World starring Tom Hanks take place in a fictionalized Erath County shortly after the end of the Civil War.

[27] In 2023 television and film producer Taylor Sheridan's company used several locations in Erath County including the Court House Square to film The Bass Reeves Story for Netflix as the Yellowstone franchise evolved to include additional places, times and events.

Erath County is home to several nationally famous people including 7-time American Rodeo Association World Champion and co-founder of Professional Bull Riders (PBR Rodeo) Tye Murray; comedic actress and winner of the Golden Globe Award for Best Supporting Actress (1972- Rowan & Martin's Laugh-In) and 5-time Emmy Award nominee Ruth Buzzi; activist Taya Kyle, widow of Navy Seal Cris Kyle who was murdered in Erath County; and it is the birth home of the late country singer-songwriter Johnny Duncan.

Stephenville in Erath County is also home to pro football star Cody Davis who plays Safety for the New England Patriots.