| Llay-Llay | |
| Other Name: | Llaillay |
| Native Name Lang: | es |
| Settlement Type: | Town and Commune |
| Flag Alt: | Flag |
| Shield Alt: | Coat of arms |
| Map Alt: | Location of the Llay-Llay commune in the Valparaíso Region |
| Pushpin Map: | Chile |
| Pushpin Map Narrow: | yes |
| Pushpin Map Alt: | Location in Chile |
| Pushpin Map Caption: | Location in Chile |
| Coordinates: | -32.8403°N -70.9483°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Chile |
| Subdivision Type1: | Region |
| Subdivision Type2: | Province |
| Subdivision Name2: | San Felipe de Aconcagua |
| Government Footnotes: | [1] |
| Government Type: | Municipality |
| Leader Title: | Alcalde |
| Leader Name: | Mario Marillanca |
| Unit Pref: | Metric |
| Area Footnotes: | [2] |
| Area Total Km2: | 349.1 |
| Elevation M: | 385 |
| Population Total: | 22659 |
| Population As Of: | 2012 Census |
| Population Density Km2: | auto |
| Population Blank1 Title: | Urban |
| Population Blank1: | 16215 |
| Population Blank2 Title: | Rural |
| Population Blank2: | 5429 |
| Demographics Type1: | Sex |
| Demographics1 Title1: | Men |
| Demographics1 Info1: | 10,799 |
| Demographics1 Title2: | Women |
| Demographics1 Info2: | 10,845 |
| Timezone: | CLT[3] |
| Utc Offset: | -4 |
| Timezone Dst: | CLST[4] |
| Utc Offset Dst: | -3 |
| Area Code: | 56 + 34 |
| Website: | Municipality of Llay-Llay |
Llay-Llay is a town and commune in the San Felipe de Aconcagua Province of central Chile's Valparaíso Region.
The commune was established on 6 April 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 14 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 6 April 1875 by Supreme Decree it was granted the title of town.
The Commune of Llay-Llay was included into the Department of Quillota, which was split into four districts, in December 1925. According to the country's regional government, it became part of the province of San Felipe de Aconcagua in March 1976.
Llay-Llay spans an area of 349.1sqkm.[2] The record high temperature of 42C was registered on January 26, 2019 in Llay-Llay. [5]
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.[2]
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:[1]
Within the electoral divisions of Chile, Llaillay is represented in the Chamber of Deputies by Marco Antonio Núñez (PDC) and 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).