Project A-ko 4: Final is a 1989 Japanese anime OVA release directed by Yuji Moriyama. It is the fourth installment of the Project A-ko series.

Project A-ko is a 1986 Japanese action comedy science fiction anime film that had several sequels and a spin-off. This film focuses on 16-year-old Japanese teenage schoolgirl A-ko Magami, who defends her best friend C-ko Kotobuki, as they face off against their fellow classmate and rival B-ko Daitokuji while the Earth faces the threat of an alien invasion. This series references a number of other works of anime from the 1970s and 1980s, such as Gundam, Macross, and Fist of the North Star.