Mexicali, the capital of the state of Baja California, is one of the youngest yet most significant cities in northern Mexico. Its history is closely tied to the development of fertile lands in the Colorado River delta and large-scale irrigation projects at the turn of the 19th and 20th centuries. The official founding date of the city is considered to be 14 March 1903. Mexicali owes its emergence to agricultural development initiated by American companies that saw immense potential in the irrigated lands of the valley. The city's name is a fusion of the words "Mexico" and "California", symbolising its border location. On the American side of the border, the sister city of Calexico emerged simultaneously, its name formed by the same principle.
The development of Mexicali would have been impossible without several key factors:
- Geography and Irrigation: Its location in the Colorado River valley and the construction of irrigation canals transformed the arid desert into one of Mexico's most productive agricultural regions, specialising in cotton cultivation.
- Foreign Investment: The American Colorado River Land Company owned vast territories and actively attracted farmers and workers to develop the land, which contributed to rapid population growth.
- Trade: Proximity to the US border defined the city's role as an important trade and transport hub.
In the early 20th century, Mexicali's economy was almost entirely agrarian, dominated by cotton farming. This period went down in history as the "era of white gold". An important cultural feature was the formation of a large Chinese diaspora. Migrants from China, initially arriving to work on the construction of irrigation systems and in the fields, made a significant contribution to the economic and social life of the city by opening restaurants, shops, and laundries. This cultural influence remains noticeable in Mexicali to this day.