■ Etymology
What is now the town’s Barangay Punta was the seat of an earlier settlement later known as Halaán. During the summer from April to May, the shores of Laguna de Bay along Punta would be filled with small shellfish locally known as halaán. As is typical with many modern Philippine toponyms, the town’s name supposedly resulted from miscommunication between early Spanish visitors and natives. The Spaniards enquired of some natives along the shoreline, ”¿Como se llama este sitio?” (”What is the name of this place?”) to which the latter replied, ”halaán pò,” thinking that the foreigners referred to the shells. The Spaniards accepted the response as the name of the place, and began calling it halaán, later corrupting it into Jalajala. Another folk etymology is that Jalajala stems from an endemic breed of boar called berk jala, which is abundant in the wilds around the town and is depicted on its seal. As with the other story, a Spaniard asked the Tagalog-speaking natives the place’s name, and the locals’ interjection of ”hala-hala” (possibly a hunting chant) was taken by the Spaniards to be their answer.
■ Geography
Jalajala is on a peninsula located 75 kilometers (47 mi) southeast of Manila in the largest freshwater lake in the Philippines, Laguna de Bay. It lies on the eastern part of the Rizal Province and has a land area of 4,930 hectares (12,200 acres) representing 3.77％ of the total land area of the province. Jalajala’s political boundary on the north is the Panguil River, wherein it shares the boundary with the town of Pakil in Laguna. On its southern, eastern, and western boundaries lies the Laguna de Bay. Mount Sembrano forms the boundary of Jalajala and Pililla.
□■ Barangays
Jalajala is politically subdivided into eleven barangays (three urban, eight rural). Bayugo, Palay-Palay, and Sipsipin were elevated as barrios in 1956. Bagumbong Bayugo Second District (Poblacion) Third District (Poblacion) Lubo Pagkalinawan Palaypalay Punta Sipsipin First (Special) District (Poblacion) Paalaman
■ Demographics
In the 2020 census, the population of Jala-jala, was 34,017 people, with a density of 770 inhabitants per square kilometre or 2,000 inhabitants per square mile.
■ Economy

东北 5.5Km	Mount Sembrano
东北 5.5Km	Mount Sembrano
西北 8.4Km	贝湖
东北 13.2Km	Mabitac
西北 13.9Km	Pililla
东北 15.4Km	Siniloan
东北 15.9Km	Famy

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