Senica District (okres Senica) is a district in the Trnava Region of western Slovakia. The district is relatively rich in natural resources oil, gas, lignite. It is industrial district, in the late period had been established here new industrial facilities. Senica District in its present borders had been established in 1996. Administrative, cultural and economic center is its seat and largest town Senica. In Senica District is located spa Smrdáky and of cultural importance is also basilica in Šaštín.