凯斯特海伊是匈牙利的城市，位于该国西部巴拉顿湖西岸，由佐洛州负责管辖，面积75.98平方公里，每年降雨量495毫米，主要经济活动是旅游业，2001年人口21,803。

Keszthely (Hungarian pronunciation: [ˈkɛsthɛj]; Slovene:Blatenski Kostel; German:Kesthell) is a Hungarian city of 20,895 inhabitants located on the western shore of Lake Balaton. It's the largest city by the lake and one of the more important cultural, educational and economic hubs in the region. Due to its favorable location and accessibility by both road and rail, Keszthely and the surrounding area is a preferred holiday destination.