The 3rd constituency of Hajdú-Bihar County () is one of the single member constituencies of the National Assembly, the national legislature of Hungary. The constituency standard abbreviation: Hajdú-Bihar 03. OEVK.

Since 2026, it has been represented by László Csák of the Tisza Party.

Geography The 3rd constituency is located in north-eastern part of Hajdú-Bihar County.

List of municipalities The constituency includes the following municipalities:

Members The constituency was first represented by László Tasó of the Fidesz from 2014, and he was re-elected in 2018 and 2022. In the 2026 election, László Csák of the Tisza Party was elected representative.

Election Member Party % 2014 László Tasó Fidesz 51.64 2018 58.16 2022 63.512026László CsákTISZA50.92

References