Tiszaújváros (Hungarian: Tiszaújvárosi járás) is a district in south-eastern part of Borsod-Abaúj-Zemplén County.

The district is located in the Northern Hungary Statistical Region.

(ordered by population, as of 1 January 2012)[1] The bolded municipality is the city.

Besides the Hungarian majority, the main minorities are the Roma (approx.

2,000 persons in Tiszaújváros District did not declare their ethnic group at the 2011 census.