Laguna wraps around the southern and eastern shores of Laguna de Bay — the largest lake in the Philippines — and extends south into the foothills of Mount Banahaw. It is a province that has produced a disproportionate share of Philippine history: José Rizal was born here, the first Tagalog dictionary was printed here, at Pila in 1613, and the oldest document ever found in the Philippines, the Laguna Copperplate Inscription of 900 CE, was discovered here in 1987, near the mouth of the Lumbang River in Lumban.
Santa Cruz serves as the provincial capital, but the province's character is defined less by its administrative center than by the cluster of towns surrounding the lake — Los Baños, Calamba, Pagsanjan, Alaminos — each with its own distinct identity and claim to significance.
Laguna de Bay — 'Lake of Bay' — is the largest lake in the Philippines, with a surface area of 911 to 949 square kilometers. Despite its size, it averages only 2.8 meters in depth, making it one of the shallowest large lakes in the world. It provides water, fish, and livelihood to the communities along its shores and is a major source of freshwater fish for Metro Manila.
Laguna is also known for its hot springs — Los Baños and Pansol are among the most popular hot spring resort areas accessible from Manila — for its buko (coconut) pie, which has become a national culinary institution, and for the scenic Pagsanjan Falls, which actually lie in Cavinti, in the mountain interior.
The 2024 census counted 3,687,345 people in Laguna's 24 municipalities and six cities, Biñan, Cabuyao, Calamba, San Pablo, San Pedro and Santa Rosa, on 1,917.85 square kilometers. The province was once called La Laguna, or La Provincia de la Laguna de Bay, after the lake that forms its northern boundary, and in the Spanish era it also took in parts of what are now Rizal and Quezon. Bay was the provincial seat until 1688, then Pagsanjan, and Santa Cruz has been the capital since 1858.














