Rosario is a 1st class municipality in the province of Batangas, Philippines. According to the 2000 census, it has a population of 86,110 people in 16,288 households.
Rosario is also considered as among the interior municipalities of the Batangas Bay Region comprising of 11 municipalities and 2 cities whose catchment areas drain into the Batangas Bay.
The immediate past municipal officials were elected during the 2004 General Elections and their term expired 2007. The incumbent mayor is Felipe Marquez who was reelected for his second term during the 2007 General Elections as chief executive of Rosario. The vice mayor is Danilo Alday. Sangguniang Bayan is composed of Angelica Rosales, Leonardo Anyayahan, Sonia Ebite, Adrian Montalbo, Kennedy Laroza, Pedro Andan and Johnny Minas. Sangguniang Kabataan Municipal Federation President is Grace Villar of Brgy. Quilib.
In compliance with the principles of 1992 Earth Summit in Rio de Janeiro, the Municipal Government of Rosario, Batangas formulated the Aksyon ng Bayan Rosario 2001 And Beyond Human and Ecological Security Plan[5] by virtue of Executive Order No. 98-02 dated October 5, 1998 by then Mayor Rodolfo Guerra Villar.
The plan pursued a sustainable development approach to poverty reduction efforts balanced with concerns for ecological security. This required an active collaboration among the municipal and barangay government units, non-governmental and people's organizations, and the local community.
To further institutionalize this framework and integrate its principles in local development plans, the CLUP was prepared by the Municipal Land Use Committee and the Office of the Municipal Planning and Develoment Coordinator, with technical assistance from the Housing and Land Use Regulatory Board (HLURB). In 2000, the CLUP and its accompanying Zoning Ordinance (ZO) was approved with immediate effect.