Landiona is a comune located in the Piedmont region of northern Italy. It is situated within the Province of Novara, positioned approximately 15 kilometres (9 mi) northwest of the city of Novara and about 70 kilometres (43 mi) northeast of Turin.
The municipality covers a total area of 7.3 square kilometres (2.8 mi2). As of December 31, 2004, Landiona had a recorded population of 600 residents.