The McMillan Hall is a municipal building in Dashwood Square in Newton Stewart, Dumfries and Galloway, Scotland.

[2] In the early 1880s, the burgh leaders found that the old town hall was inadequate for their needs and, after the local grocers, Peter and William McMillan, left £10,000 in their wills towards the cost of a new town hall, the burgh leaders decided to commission a new structure.

On the extreme right of the frontage, there was an additional narrow bay, which was recessed and fenestrated by casement windows on both floors.

[7] A war memorial, in the form of a Celtic cross mounted on a pedestal, which was intended to commemorate the lives of local service personnel who had died in the First World War, was unveiled outside the hall in the presence of the Lord Lieutenant of Wigtown, Sir Herbert Maxwell, 7th Baronet, in June 1921.

[13][14] However, the building subsequently continued to serve in its traditional role as a community events venue hosting concerts and theatre performances.