Marian-glas or Marianglas (Welsh pronunciationⓘ) is a small village in Anglesey, north-west Wales.

There is a large caravan park on the edge of the village and several camp sites.

It has a memorial to those killed in the two world wars, including a list of 17 seamen from the Merchant Navy.

AN093) is a roundhouse settlement dating at least back to Roman times.

The location is indicated on the ground through a signboard by the Ministry of Public Building and Works (which dates the sign to 1962–70).