Winsum (population: 14,051) is a town in the northeastern Netherlands, in the province of Groningen. The municipality covers an area of 102.53 km2 (of which 1.33 km2 water).
The municipality of Winsum also includes the following towns, villages and townships: Abbeweer, Adorp, Aduarderzijl, Alinghuizen, Allersma, Antum, Arwerd, Baflo, Bellingeweer, Beswerd, Bolshuizen, De Dingen, De Raken, De Schifpot, De Schoor, De Vennen, Den Andel, Duisterwinkel, Ernstheem, Ezinge, Feerwerd, Garnwerd, Groot Wetsinge, Hammeland, Hardeweer, Harssens, Hekkum, Hiddingezijl, Klein Garnwerd, Krassum, Lutje Marne, Lutke Saaksum, Maarhuizen, Obergum, Oldenzijl, Oostum, Ranum, Rasquert, Saaxumhuizen, Sauwerd, Schapehals, Schaphalsterzijl, Schilligeham, Suttum, Takkebos, Tijum, Tinallinge, Valkum, Wierum, Wierumerschouw, Wildeveld.
