| Status | EX |
|---|---|
| Status system | IUCN2.3 |
| Genus | Sinployea |
| Species | youngi |
| Authority | Garrett, 1872 |
Sinployea youngi was a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Charopidae. This species was endemic to the Cook Islands; it is now extinct.