Mabini has a total land area of three hundred thirty-nine thousand square meters (339,000 m2) and a total population of one thousand six hundred fifty-four (1,654). It is bounded on the east by Brgy. San Bartolome, on the north by San Agustin, on the west by Vargas, Sta. Ignacia, and on the south by Brgy. Calayaan. Agriculture is the main source of livelihood among its inhabitants