Tibor Bastrnák (born 17 November 1964 in Šahy) is a Slovak politician who served as a member of the National Council in 2002–2020 in the Party of the Hungarian Community caucus (until 2009) and from 2009 in the Most–Híd caucus. As a senior member of Most-Híd, he was among the supporters of coalition with Direction – Slovak Social Democracy.
In addition to national politics, Bastrnák served the major of Komárno in 2003–2010.
Bastrnák studied medicine at the Masaryk University. Following his graduation, he worked as a gynecologist in a local hospital in Komárno.