1776Government
Presidio de San Bernardino was established in 1776 and abandoned in 1780.
1902Architecture
The Calumet and Arizona Company Smelter was built in 1902.
1903History
The date was February 8, 1903.
1904Economy
The Copper Queen operated in Douglas from 1904 until 1931, when the Phelps Dodge Corporation purchased the Calumet and Arizona Company and took over their smelter.
1905Government
James Douglas and was incorporated in 1905.
1907Architecture
== Cityscape ==
=== Arts and culture ===
Douglas is home to the historic Gadsden Hotel, which opened in 1907.
1910Military
The United States Army established Camp San Bernardino in the latter half of the 19th century near the presidio, and in 1910 Camp Douglas was built next to the town.
1912History
The cemetery was in use from 1912 to 1963.
1913History
The all-time low temperature was −7 °F (−22 °C), which occurred in January 1913.
1916Military
In 1916, the Mexican revolutionary leader Pancho Villa threatened to attack Douglas, believing Americans responsible for his defeat at the Second Battle of Agua Prieta.
1919Architecture
The Douglas Grand Theatre was built in 1919 and was the largest theater between Los Angeles and San Antonio.
1926Disaster
On June 23, 1926, missing evangelist Aimee Semple McPherson was found collapsed near a road at the adjacent Mexican town of Agua Prieta.
1929Disaster
The hotel was leveled by fire and rebuilt in 1929.
1983History
The town was the site of the Arizona Copper Mine Strike of 1983.
1987History
Douglas was the site of the Phelps-Dodge Corporation Douglas Reduction Works until its closure in 1987.
1990History
It was discovered in May 1990.
1991History
The smoke stacks of the smelter were not taken down until January 13, 1991.
1992Military
Following its discovery, the Cartel refocused their smuggling operations towards Tijuana and Otay Mesa, San Diego where it acquired a warehouse in 1992.
2008History
For the period 2008–12, the estimated median annual income for a household in the city was $28,548, and the median income for a family was $33,117.
2009Architecture
Today (2009) the theater is undergoing reconstruction, using private donations of money, supplies and labor.
2010History
== Demographics ==
As of the census of 2010, there were 17,509 people, 4,986 households, and 3,662 families residing in the city.