Onstaborg may refer to:
*
Onstaborg (Sauwerd), a former ''borg'' in Sauwerd, Netherlands
*
Onstaborg (Wetsinge)
Onstaborg (also known as ''Nieuw Onsta'' in Dutch, meaning "New Onsta") was a borg in the village of Wetsinge, Groningen, Netherlands.
The borg was built around 1500 by the family Onsta (also known as Onseda, Onsitha or Onsatha). The Onsta f ...
, a former ''borg'' in Wetsinge, Netherlands
{{Disambig