November’s general election will also be a special election.
Voters who live in Congressional District 1, which encompasses urban Honolulu, will choose who they want to serve out the rest of late Congressman Mark Takai’s term.
His term ends in January.
Among the first to file was retired Air Force Col. Shirlene Dela Cruz Ostrov, who’s running as a Republican.
Former U.S. Rep. Colleen Hanabusa also filed Monday.
Candidates have until next Thursday to file their nomination papers.