Kálvin tér (English: Calvin Square) is a major square and intersection in the city center of Budapest, the capital of Hungary. It was named after the French Protestant Reformer John Calvin (Kálvin János in Hungarian).
Múzeum körút ('Museum boulevard'), Vámház körút, Üllői út ('Üllő street'), Baross utca ('Baross street'), and Kecskeméti utca ('Kecskemét street') converge here. It is also the location of the Kálvin tér station on the M3 (North-South) line of the Budapest Metro.
The Hungarian National Museum is near Kálvin tér.