Pelaghia Roșu (1800 - 10 June 1870) was a Romanian revolutionary who participated in the Wallachian Revolution of 1848. She commanded a battalion of women in defense of her village.
She was born in Mărișel, a small village near Cluj-Napoca. Her father, Ioan Dufle, made military instructions at home, using Romanian books.
She was married to Ioan Roșu and had one child, named Indei (Andrei).