Nearly 62 million Filipinos will head to the polls on Monday in a vote that is expected to strengthen President Rodrigo Duterte’s grip on power.
Voting began at 2200 GMT Sunday and will close at 18:00.
Duterte, who completed half of his six-year term, is not contesting himself, but several of his children are.
His daughter Sara is running to keep her post as mayor in Davao city, while sons Sebastian is seeking the city's vice-mayoral seat and Paolo standing for a seat in the lower House of Representatives.
The elections are seen by some as a referendum on the president, that could allow him to expand his contentious anti-drug crackdown.
The results for municipal and city mayors and councils are expected late Monday, with winners for the Senate and congressional seats likely to be out on Friday.
Trump: Iran deal 'loud and clear' that Tehran won't have nuclear weapon
Russian frigate fires warning shots near UK waters
India curbs Telegram use over medical exam fraud concerns
Red Cross says Congo Ebola epidemic yet to peak, may last a year
Ukraine's Zelenskyy says he offered to meet Putin at G7 or the US
