Pennyroyal may refer to:
Herbs Mentha pulegium (pennyroyal or European pennyroyal), a European herb Hedeoma pulegioides (American pennyroyal or false pennyroyal), an American herb Monardella odoratissima (mountain pennyroyal), mint family plant found in the southwestern and western United States
Places Pennyroyal, Victoria, a rural locality in Australia Pennyroyal Plateau, also known locally as "Pennyrile", a region of Kentucky in the United States Pennyrile Parkway, a highway in Kentucky
Other Penny Royal, an AI character from Neal Asher's Polity series "Pennyroyal", a song by Joey Badass from 1999