|Town and Commune|
|Province||San Felipe de Aconcagua|
|• Alcalde||Mario Marillanca|
|• Total||349.1 km2 (134.8 sq mi)|
|Elevation||385 m (1,263 ft)|
|Population (2012 Census)|
|• Density||65/km2 (170/sq mi)|
|Time zone||CLT  (UTC-4)|
|• Summer (DST)||CLST  (UTC-3)|
|Area code(s)||56 + 34|
|Website||Municipality of Llay-Llay|
The commune was born on the April 6 of 1875 during the government of President Federico Errázuriz Zañartu, A railway station was initially built for the three copper smelters that existed there.
Llay-Llay made news on the 14 of September 1863, the date was celebrated with a grand banquet in the village to celebrate the official opening of the railway line between Santiago and Valparaiso, an act that was attended by the President of the Republic, Don José Joaquín Pérez. On April 6, 1875 by Supreme Decree it was granted the title of town.
In December 1925, the Commune of Llay-Llay was integrated into the Department of Quillota, divided into four districts. As of March 1976, according to the regional administration of the country, it joined the province of San Felipe de Aconcagua.
Llay-Llay spans an area of 349.1 km2 (135 sq mi).
According to data from the 2002 Census of Population and Housing, the Llay-Llay commune had 21,644 inhabitants; of these, 16,215 (74.9%) lived in urban areas and 5,429 (25.1%) in rural areas. At that time, there were 10,799 men and 10,845 women.
As a commune, Llay-Llay is a third-level administrative division of Chile, administered by a communal council (consejo comunal), which is headed by a directly elected alcalde. The current alcalde is Mario Marillanca. The communal council has the following members:
- Patricio Durán
- Margarita Puebla
- Marcos Flores
- Mésala González
- Oscar Hidalgo
- Manuel Maldonado
Within the electoral divisions of Chile, Llaillay is represented in the Chamber of Deputies by Mr. Marco Antonio Núñez (PDC) and Mr. Gaspar Rivas (RN) as part of the 11th electoral district, (together with Los Andes, San Esteban, Calle Larga, Rinconada, San Felipe, Putaendo, Santa María, Panquehue and Catemu). The commune is represented in the Senate by Ignacio Walker Prieto (PDC) and Lily Pérez San Martín (RN) as part of the 5th senatorial constituency (Valparaíso-Cordillera).
- (Spanish) "Municipality of Llaillay". Retrieved 29 July 2010.
- (Spanish) "National Statistics Institute". Retrieved 29 July 2010.
- "Chile Time". WorldTimeZones.org. Retrieved 2010-07-29.
- "Chile Summer Time". WorldTimeZones.org. Retrieved 2010-07-29.