The druids were Celts. There is no evidence connecting Stonehenge to druids.
Was stonehenge built by druids?
No. The Celts didn’t expand into Britain until between
the 5th to 3rd C. BCE. Stonehenge was completed by
about 1600 BCE. The Druids, however, did have enough
astronomical knowledge to realize the significance of
Stonehenge. They may have used Stonehenge, at least
for observational purposes, although there is no clear
evidence to support this.