San Jose del Monte was placed in the fourth district of Bulacan after the reorganization of the province's legislative districts under the new which took effect on February 7, 1987. San Jose del Monte, which became a city in 2000, was separated from the fourth district of Bulacan on December 18, 2003 by virtue of which amended the city charter (), and elected its own representative starting in the 2004 elections. However the city's residents still vote as part of the province's 4th Sangguniang Panlalawigan district for the purpose of electing Provincial Board members.