Zip Code / Postal Code of Bulacan, Bulacan

Bulakan, officially the Municipality of Bulakan (Tagalog: Bayan ng Bulakan), is a 1st class municipality in the province of Bulacan, Philippines. According to the 2020 census, it has a population of 81,232 people. It is 35 kilometers (22 mi) north of Manila. Bulakan, which is one of the oldest towns in the Philippines, became the encomienda or capital of the Provincia de la Pampanga, and later became the first capital of the Province of Bulacan before it was moved to Malolos early during the American occupation. With regards to whether to use the letters "c" or "k" to refer to the municipality of Bulakan, the New Provincial Administrative Code of Bulacan (Ordinance no. C-004) of 2007 states on Chapter 2, Section 15 that the word "Bulakan" stands for the municipality and first capital of the province while "Bulacan" refers to the province itself.
Source: Wikipedia