Arja is a Finnish female name and may refer to:
Arja Alho (born 1954), Finnish politician Arja Hannus, Swedish orienteering competitor Arja Kajermo, cartoonist, born in Finland, raised in Sweden, currently residing in Ireland Arja Koriseva (born 1965), award-winning Finnish singer Arja Nuolioja, Finnish ski-orienteering competitor and world champion Arja Saijonmaa (born 1944), Finnish singer, political activist and occasional actress Arja Salafranca (born 1971), South African writer, poet and journalist