Joseph Onika (born May 2, 1967 in Komunima’aga Village, Longu District, Guadalcanal Province) is a Solomon Islands politician.
He worked in catering before going into politics. His career in national politics began when he was elected to Parliament as the member for East Central Guadalcanal in the August 2010 general election, standing as an independent candidate. He was then appointed Minister for Women, Youth and Children’s Affairs in Prime Minister Danny Philip's Cabinet.
In April 2011, he was reshuffled to Minister for Lands, Housing and Survey. When Gordon Darcy Lilo replaced Philip as Prime Minister in November 2011, Onika retained his position in government.
He was successfully competing in athletics.