The Mariensztat Market Place (Polish: Rynek Mariensztacki) is an urban square in Warsaw, Poland.

It is located in the neighbourhood of Powiśle within the Downtown district, between Mariensztat, Krzywopoboczna, Źródłowa, and Garbarska Streets.

The square originally formed in 1843, as a small market place, eventually becoming a major retail location around 1865.

After 1843, the Warsaw city hall bought an area in the neighbourhood of Mariensztat, forming there a small market place.

[7] At the market place was also constructed a fountain with sculptures of boys looking at the water, made by Jerzy Jarnuszkiewicz.