Gmina Wielbark is an urban-rural gmina (administrative district) in Szczytno County, Warmian-Masurian Voivodeship, in northern Poland. Its seat is the village of Wielbark, which lies approximately south of Szczytno and south-east of the regional capital Olsztyn.
The gmina covers an area of , and as of 2006 its total population is 6,257.
Gmina Wielbark contains the villages and settlements of Baranowo, Borki Wielbarskie, Ciemna Dàbrowa, Dàbrowa, Gà Âuch, Jakubowy Borek, Jankowo, Jesionowiec, Kipary, Koà Âodziejowy Gràd, Kucbork, à Âatana Maà Âa, à Âatana Wielka, Lejkowo, Lesiny Maà Âe, Lesiny Wielkie, à Âysak, Maliniak, Nowojowiec, OlÃÂdry, Ostrowy, Piwnice Wielkie, Przeà ºdziÃÂk Maà Ây, Przeà ºdziÃÂk Wielki, Róklas, SÃÂdrowo, Stachy, Szymanki, Wesoà Âówko, Wesoà Âowo, Wielbark, Wyà ¼egi, Zabiele, Zapadki, Zieleniec and Zieleniec Maà Ây.
Gmina Wielbark is bordered by the gminas of Chorzele, Czarnia, Janowo, Jedwabno, Rozogi and Szczytno.