Fiamignano is a comune located in the Province of Rieti within the Italian region of Latium. It is situated approximately 70 kilometres (43 mi) northeast of Rome and about 25 kilometres (16 mi) southeast of Rieti.
Historically, the municipality was part of the Province of L'Aquila in the region of Abruzzi e Molise until it was transferred to its current administrative location in 1927.