Helen Elizabeth Roy, MBE, FRES (born 6 November 1969) is a British ecologist, entomologist, and academic, specialising in ladybirds and non-native species.

From 1997 to 2008, she taught at Anglia Ruskin University, rising to the rank of Reader in Ecology.

She is the co-organiser of the UK Ladybird Survey, alongside Dr Peter Brown, is a visiting professor in the School of Biological Sciences, University of Reading, is co-chair of the IPBES assessment of invasive alien species, and is a past President of the Royal Entomological Society.

[1] From 1989 to 1992, she studied biology at the University of Southampton, graduating with an upper-second class Bachelor of Science (BSc) degree.

[6] Roy was awarded the 2012 Silver Medal by the Zoological Society of London "for contributions to the scientific understanding of ladybird ecology and conservation".