Tulln an der Donau is a historic town in the Austrian state of Lower Austria. It serves as the administrative seat of Tulln District.
The town is known for its abundance of parks and gardens, which has earned it the nickname Blumenstadt, or "Flower Town." It has also been referred to as "The City of Togetherness," a description that followed an initiative of Peter Eisenschenk, the Mayor of Tulln.