Groenlo (Dutch pronunciation: [ˈɣrunloː]) is a city in the municipality of Oost Gelre, situated in the eastern part of the Netherlands on the German border, a region in the province of Gelderland called the Achterhoek (literally: "back corner"). Groenlo was a municipality until 1 January 2005, when it merged with Lichtenvoorde. Until May 19, 2006 Groenlo was the official name of Oost Gelre.