National Heroes Square, Cultural heritage square near National Assembly Building, Ljubljana, Slovenia.

National Heroes Square is a park in central Ljubljana between the National Museum of Slovenia and the National Assembly building, bounded by Tomšičeva, Šubičeva and Muzejska streets. A path runs diagonally through it, and in the southern part stands the Tomb of National Heroes, a burial site from 1949. Fifteen tree species grow here, planted in groups with shrubs.

The square was established as a memorial site in 1949 when architect Edo Mihevc and sculptor Boris Kalin created the Tomb of National Heroes. This monument was intended to preserve memory of the armed resistance during the occupation.

The square's name comes from the Tomb of National Heroes, placed in its southern part in 1949; in 1952 the city renamed the former Museum Square after it. The park also holds busts added later: Stane Kavčič (2009), France Bučar (2015) and Janez Stanovnik (2020).

The park is bounded by Tomšičeva ulica to the north, Šubičeva ulica to the south and Muzejska ulica to the west, with the National Assembly building closing it off on the west side. A path runs diagonally through the grounds, and a protected chestnut avenue along Tomšičeva once led towards Tivoli.

The Valvasor monument by sculptor Alojz Gangl has stood in the park since 1903 on an artificial mound built specifically to carry it. The park holds fifteen tree species, some of them rare, planted in groups with shrubs so the planting reads as one composition.