San Javier (Spanish pronunciation: [saŋ xaˈβjeɾ]) is a Chilean city and commune located in the Province of Linares, Maule Region.

There are many villages and other smaller, rural entities within the communal territory; several of them are quite distant from the main urban centers and relatively isolated from the more distorting external cultural influences.

Also, along the paved road that connects the towns of San Javier and Villa Alegre there are some outstanding examples of traditional Chilean rural architecture, which is especially noticeable in the farm houses (casas de fundo) typical of the region.

As a commune, San Javier is a third-level administrative division of Chile administered by a municipal council, headed by an alcalde who is directly elected every four years.

The commune is represented in the Senate by Hernán Larraín (UDI) and Manuel Antonio Matta (PDC) as part of the 11th senatorial constituency (Maule-South).