Polling stations will close at 7:00 p.m. local time (5:00 p.m. GMT), TASS reported.
The parliament has 199 seats, with 106 mandates distributed in single-seat constituencies and 93 - by party lists.
The ruling coalition of Fidesz - Hungarian Civic Alliance and the Christian Democratic People's Party (KDNP) currently holds the constitutional majority of 135 votes.
Its main political rival is the Respect and Freedom Party, commonly known by its Hungarian abbreviation Tisza Party, led by P·ter Magyar, a former member of Fidesz, who was elected as Tisza's leader on 22 July 2024.