Lindau is a major town and island on the eastern side of Lake Constance in Bavaria, Germany. It is the capital of the county (Landkreis) of Lindau, Bavaria and is near the borders of the Austrian state of Vorarlberg, and the Swiss cantons of St. Gallen and Thurgau. The coat of arms of Lindau town is a linden tree, referring to the supposed origin of the town's name. The historic town of Lindau is located on the 0.68-square-kilometre (0.26 sq mi) island of the same name, which is connected with the mainland by a road bridge and a railway causeway leading to Lindau station.

On the island of Lindau in the eastern Lake Constance is the Altstadt of the Bavarian county town of Lindau, which occupies the eastern part of the island. The island of Lindau, which forms 2% of the area and 12% of the population of the entire town, is one of the town's ten administrative districts. The district is just called Insel ("Island").