The Capture of Malolos (Filipino: Labanan para sa Malolos), also known as the Battle of Malolos, occurred on March 31, 1899, in Malolos, Bulacan, during the PhilippineAmerican War. General Arthur MacArthur Jr.'s division advanced to Malolos along the Manila-Dagupan Railway. By March 30, American forces were advancing toward Malolos. Meanwhile, the Aguinaldo government moved its seat from Malolos to San Isidro, Nueva Ecija.

Malolos, officially the City of Malolos (Tagalog: Lungsod ng Malolos), is a 3rd class component city and capital of the province of Bulacan, Philippines. According to the 2020 census, it has a population of 261,189 people. It is the capital city of the province of Bulacan as the seat of the provincial government.The city is 45 kilometres (28 mi) north of Manila, the capital city of the Philippines. It is one of the major suburbs conurbated to Metro Manila, situated in the southwestern part of Bulacan, in the Central Luzon Region (Region 3) in the island of Luzon and part of the Metro Luzon Urban Beltway Super Region.

Malolos was the site of the constitutional convention of 1898, known as the Malolos Convention, that led to the establishment of the First Philippine Republic, at the sanctuary of the Barasoain Church. The convent of the Malolos Cathedral served as the presidential palace at that time. Malolos gave birth to the first constitutional republic in Asia.