D'Argo Sun-Crichton is a fictional alien character from the Farscape universe.

D'Argo Sun-Crichton is the half-human, half-Sebacean son of John Crichton and Aeryn Sun. D'Argo was named after the Luxan Ka D'Argo after his heroic behavious saved them during a Scarran attack. D'Argo was birthed with assistance from Chiana and Crichton on a planet that was home to the Eidelons .

After conception, D'Argo was held in statis due to a Sebacean quirk that allows the birth of a baby to be delayed for up to seven cycles. During this stasis, several factions tried to gain control of the child for the chance at accessing Crichton's wormhole knowledge from it.

The pregnancy came at a difficult time as well, as the child was accidently released from stasis after Rygel ends up with a piece of a crystallized Aeryn inside of him. After developing inside Rygel for a time, it was transferred to Aeryn.