|Seat of Government||Municipality of Calaca, Batangas|
|Congressional District||1st District|
|Number of Voting Precints||243|
How Calaca Got Its Name
The Town of Calaca was officially established on May 10, 1835. Before its conversion into a municipality, Calaca was a barrio of Balayan situated on the left bank of the Bolbok River.
The first version was about the story of ten Datus who escaped from Borneo and reached the islands of Panay in the Philippines. Out of the ten Datus, two of them continued their journey until they reached the southern portion of Luzon.
Historical Growth of
Population / Population Trend
Historically, the population of Calaca, Batangas has been estimated to increase from 5,838 in 1903 to 58,086 in 2000. The last decade registered a population growth rate of 2.42% from 1990-2000. The increased in population can be attributed to the higher number of birth than the number of deaths in a year. There are 20 livebirth per 1000 population in a year while there is only an estimated average ratio of 3 deaths per 1000 population in a year.
Geology and Geomorphology
The Municipality of Calaca, Batangas is located at 13° 56` latitude and 120° 49` longitude at the southwestern mouth of Luzon Island along the western part of Batangas Province. It is situated East of the Municipalities of Balayan, Tuy and Nasugbu, west of the Municipalities of Lemery and Laurel and North of Balayan Bay. It lies within the southwest slopes of the Talisay. Calaca is a coastal town, being bounded by Balayan Bay on the South. It is a plain near the shore, gently rolling in the middle and going steep o the northern-most part adjacent to Gulod ng Batulao.
Rainfall is the amount of the precipitation (rains, hill Etc) expressed in millimeters (mm) depth of the layer of the water that has fallen.
Climatologically normal gathered from 1961-1995 at Ambulong Batangas being the nearest station showed that most number of rainfall occurred between May to December within the month of July having the most number of rainfall at 335.9 mm.