The Province of Guimaras is the fifth smallest among the 80 provinces in the Philippines with an area of 604.57 square kilometers; the Philippines has a land area of 300,000 square kilometers.
Pursuant to the provisions of Republic Act No. 4667 signed by President Ferdinand E. Marcos on June 18, 1966, “the Island of Guimaras and all the municipalities comprised therein are constituted into a subprovince of the Province of Iloilo, to be known as the Subprovince of Guimaras, with the seat of government in the Municipality of Jordan.” A lieutenant-governor headed the Subprovince of Guimaras.
At the time of enactment of RA 4667, Jordan, Nueva Valencia, and Buenavista were the three municipalities of Guimaras.
Republic Act No. 7160, otherwise known as the Local Government Act of 1991 approved on October 10, 1991 mandated sub-provinces to be “converted into regular provinces upon approval by a majority of the votes cast in a plebiscite to be held in the said subprovinces and the original provinces directly affected. The plebiscite shall be conducted by the COMELEC simultaneously with the national elections following the effectivity of this Code.” (Section 462).
On February 20, 1995, President Fidel V. Ramos signed into law Republic Act No. 7896 which created the Municipality of Sibunag composed of the Barangays Sebaste, Bubog, Sabang, San Isidro, Alegria, Ayangan, Inampulogan, Millan, Maabay, Tanglad, Ravina, and Dasal in the Municipality of Jordan; and barangays Oracon and Concordia in the Municipality of Nueva Valencia (Section 1).
Another law (Republic Act No. 7897) was approved by President Ramos on that same day. Barangays Suclaran, Cabungahan, M. Chavez, San Enrique, and Gaban in the Municipality of Buenavista; and barangays Cabano, Constancia, Igcauayan, Aguilar, Sebario, Tamborong, and Sapal in the Municipality of Jordan, were separated from their respective municipalities and constituted into a distinct and independent municipality to be known as the Municipality of San Lorenzo (Section 1).
Note: This part of LegendHarry‘s July 30-August 8, 2013 Panay Island Backpacking Trip.