Baltasound (or Baltasund[citation needed]) is the largest settlement on the island of Unst in Shetland, Scotland.

The village lies halfway along the island's east coast on a sheltered bay called Balta Sound.

A memorial stone erected outside the house by the elder Thomas Edmondston commemorates scientific studies undertaken there by the French physicist Jean-Baptiste Biot.

[8] Similar to fellow Shetland station Lerwick, Baltasound experiences a cool oceanic climate that borders a subpolar climate (Köppen: Cfb and Cfc, respectively), with winters that are mild for the latitude, and short, cool summers.

[10] During the summer solstice, Baltasound experiences what is known as civil polar day, where the sun sets in the evening and rises the next morning, but between these times it does not get completely dark.