Dr. Arturo “Arthur” J. Angara (born February 7, 1937), otherwise known as AJA, was a Filipino politician and national awardee for public service. He was the former national deputy secretary-general of and former national adviser for the League of Municipalities of the Philippines (LMP). He was the longest-serving mayor of the municipality of Baler in the Philippine province of Aurora, with his terms of office covering a period of 18 years.