The slave ship Apolo arrived with enslaved Africans in Brazil. About 239 people had been taken aboard and approximately 231 arrived.

Vessel: Apolo; flag: Portugal / Brazil; rig: Brig. People recorded in connection with the voyage: Captain: Barros, Antônio Daniel Batista; Investor: Pinto, Antônio José; Investor: Barreto, João Perreira. The voyage began at Lisbon on 2 March 1821. Principal recorded place where captives were acquired: Cacheu (Senegambia and offshore Atlantic). Principal recorded disembarkation place: Maranhão. Estimated mortality during the crossing: 3.0%. Recorded outcome: Voyage completed as intended.