Roseworthy () is a hamlet on the A30 trunk road in the parish of Gwinear-Gwithian in Cornwall, England, UK.
Roseworthy Barton is a farm half a mile south of Roseworthy.
At Roseworthy there was once a holy well and chapel of Saint Winierus, which was also the site of the most splendid Celtic cross of Cornwall (now at Lanherne).