Aguilar is a statutory town located in Las Animas County, Colorado, United States.

[8][9] In 1864, a trading post called San Antonio Plaza was created by Agapito Ribali (sometimes misspelled as Rivali or Ruballi) at the current site of the town.

[13] In 1888, the Peerless coal mine opened close to Aguilar,[14] and in 1892, the Union Pacific, Denver and Gulf Railway built a spur line west from Acme[15] to Aguilar with an additional spur to the mine, which was absorbed by the Colorado and Southern Railway in 1898.

An extension of the line was built to Brodhead in 1900 to serve it and other coal mines in the area, such as the Empire, the Gem, and the Green Canyon.

On October 29, 1913, the Aguilar post office and several other town structures were destroyed in an arson attack related to the strike.

[17] Following the Ludlow Massacre on April 20, 1914, strikers launched numerous attacks of both coordinated and spontaneous natures against mining operations, strikebreakers, and the National Guard in what is known as the Ten-Day War.

After negotiation led by Aguilar's mayor and a church minister named McDonald, the strikers abandoned the siege before fatalities on either side were reported.

[18][19]: 186 Aguilar is located in Las Animas County at coordinates 37°24′10″N 104°39′12″W / 37.4028°N 104.6533°W / 37.4028; -104.6533,[3] about one mile west of Interstate 25.