Irion County

Irion County's county seat is Mertzon. The Texas Legislature formed Irion County from Tom Green County in 1889. Sherwood became the county seat.

In 1936, Mertzon became the county seat. The county is named for Robert Anderson Irion, a secretary of the state of the Republic of Texas. 

From 1858 to 1861, Butterfield Overland Mail crossed the region. Also, oil was discovered in Irion County in 1928.

As of the 2020 census, its population was 1,513.

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