Onna is a village located in Kunigami District, Okinawa Prefecture, Japan. As of 1 October 2020, the village had an estimated population of 10,869 and a population density of 210 people per km². The total area is 50.77 square kilometres. Unlike other areas of Japan, Onna has had a sustained period of population growth in the post-war period. In 1965 the population of the village was 8,471, and by 2003 it had grown to over 10,000 residents.