Old Town Square (Czech:  Staroměstské náměstí (help·info)) is a historic square in the Old Town quarter of Prague in the Czech Republic at 50°5′14″N 14°25′17″E / 50.08722°N 14.42139°E / 50.08722; 14.42139.

Located between Wenceslas Square and the Charles Bridge, Prague's Old Town Square is often bursting at the seams with tourists in the summer. Featuring various architectural styles including the gothic Týn Church and baroque St. Nicholas Church, the square is an oasis for travelers wearied by Prague's narrow streets. Among many churches, tourists may find the Astronomical Clock on this square, while the tower at the Old Town Hall offers a panoramic view of Old Town shop.

The square's center is home to a statue of religious reformer Jan Hus, who for his beliefs was burned at the stake in Constance. The statue known as the Jan Hus Memorial was erected on July 6, 1915 to mark the 500th anniversary of his death. The square is also home to a memorial to martyrs (including Jan Jesenius and Maxmilián Hošťálek) beheaded on that spot after the Battle of White Mountain. Twenty-seven crosses mark the pavement in their honour. While the installation date of these crosses is uncertain, a nearby plaque which lists the names of all 27 victims dates from 1911.