Komárno District (Slovak: okres Komárno, Hungarian: Komáromi járás) is a district in the Nitra Region of western Slovakia. Until 1918, the district was mostly part of the county of Kingdom of Hungary of Komárom.
The district has a population of 108.556 of which 74.976 (69.1%) are Hungarians and 30.079 (27.7%) are Slovaks (2001).
Coordinates: 47°45′45″N 18°7′52″E / 47.76250°N 18.13111°E / 47.76250; 18.13111