Penelope Marshall (born 27 July 1989) is a New Zealand representative swimmer.

She won the silver medal in the 4 × 200 m freestyle relay at the 2010 Commonwealth Games alongside Lauren Boyle, Amaka Gessler and Natasha Hind.

She won the bronze medal with the same team in the 4 × 100 m freestyle relay at the same Games.

[1] She competed for New Zealand at the 2012 Summer Olympics in the women's 4 × 100 m freestyle relay.

This biographical article related to a New Zealand swimmer is a stub.