"the newly formed county they’d name Hidalgo was itself little older than the child"
New Mexico State map highlighting Hidalgo County
Public DomainNew Mexico State map highlighting Hidalgo County - Credit: David Benbennick

Hidalgo County was formed on February 25th, 1919, after annexation from its neighbouring Grant County. This was mainly done to shorten the distance that the people of Lordsburg and towns to the south had to travel to reach Silver City, the county seat.

The county was named after the Mexican town where the Treaty of Guadalupe Hidalgo was signed, which in turn was named in honour of the Mexican Independence leader Miguel Hidalgo y Costilla.

Hidalgo County is also known colloquially as the Bootheel of New Mexico after its distinctive shape.