The 1987 Constitution of the Philippines states that unless otherwise provided by law, the election of members of Congress is on every second Monday of May.

The COMELEC announced in December 2018 that the Philippine AES passed the review conducted by international systems and software testing firm, Pro V&V, in Alabama, USA.

[5] The EMS compiled the number and profile of registered voters, their geographic locations and polling precinct information, and these were used in designing the official ballots.

[13] Due to the drive to change the constitution to make the Philippines a federation, Speaker of the House of Representatives Pantaleon Alvarez said in January 2018 that the cancellation of the 2019 elections was possible, as a transition government would be needed.

Senator Franklin Drilon earlier stated that the minority bloc would have sued if Alvarez's plan of cancelling the election pushed through.

[18] With the ouster of Alvarez by Gloria Macapagal Arroyo as speaker in July 2018, the latter said that she preferred the elections pushing through.

The Hugpong ng Pagbabago, the alliance backed by Davao City mayor and presidential daughter Sara Duterte won nine of the seats up.

Other allies of the Duterte administration, such as the Nationalist People's Coalition, Lakas–CMD and various local parties, also won many seats.

[21] According to COMELEC spokesperson James Jimenez, 400–600 out of 85,000 VCMs across the country (representing 0.7%) encountered glitches.

[24] At around 10, the COMELEC has experienced problems with the transparency server where the unofficial tally has been stuck for hours, with only 0.38% of polling precincts have managed to transmit the results.

In an interview, Villanueva said that 'results were receiver by transparency server continuously, despite media temporarily not being able to see the results.'

[31] There are reported violence during the election day: a shooting occurred at the polling center in Panglima Estino, Sulu where six have been injured.

[32] In a Pulse Asia opinion poll dated June 24–30, 2019, 82% of those surveyed found the election to be believable while 82% said the release of the results were fast.

Meanwhile, 10% of respondents found their names missing in the voters list, 4% of their registration was deactivated, 1% of the vote counting machine malfunctioned, as the issues in the election.