Pennyroyal is a rural locality in Victoria, Australia. Most of the locality is situated in the Surf Coast Shire; a small section is situated in the Shire of Colac Otway. In the 2011 census, the population of Pennyroyal was too low to separately report; however in June 2014 the Victorian Electoral Commission recorded 72 enrolled voters in Pennyroyal, living in 44 properties. It was probably named in 1841 by Simeon Madden, after the plant that grew by Pennyroyal Creek.