Nieuwmarkt is a square in the centre of Amsterdam, Netherlands. The surrounding area is known as the Lastage neighborhood. It is situated in the borough of Amsterdam-Centrum.
The square is considered part of Amsterdam's Chinatown, next to the De Wallen. There are over 20 cafés and coffeeshops facing the square. There is a daily market on the square, as well as an organic food market on Saturdays and a market for antiques and books on Sundays in the summer months.
The Nieuwmarkt is dominated by a building known as the Waag, originally a gate in the Medieval city walls but converted into a weighing house after the walls were demolished in the 17th century. The square was created when the canals around the Waag were filled in 1614, and was used as a marketplace.