Arnould is a given name and surname. Notable people with the name include:
Surname Derek Clement Arnould, former Canadian diplomat Dominique Arnould (born 1966), former professional road, cyclo-cross, and mountain bike cyclist Isabelle Arnould (born 1970), retired female freestyle swimmer from Belgium Jeanne Sylvanie Arnould-Plessy (1819–1897), French stage actress Joseph Arnould (1813–1886), British judge in India and writer Kevin Arnould (born 1980), French Nordic combined skier who competed from 2000 to 2006 Rita Arnould (died 1943), courier of the Red Orchestra resistance group in Belgium Robert Arnould (born 1953), American politician Roger-Arnould Rivière (1930–1959), French poet Sophie Arnould (1740–1802), French operatic soprano
Given name Arnould de Vuez (1644–1720), painter of Flemish origin active in Lille from 1695 to 1720 Arnould Galopin (1865–1934), prolific French writer with more than 50 novels to his credit