D'Arcy is a hamlet in Midlothian, Scotland, located just south of Dalkeith near Edinburgh.

The name D’Arcy appears on the map of the three Lothians by Andrew Armstrong, dated 1773, next to Mayfield and Westhouses, on the South Centre section.

[13][12] At the disused quarry near D'Arcy farmstead, there appears an outcrop of Limestone, where the strata dips towards the River South Esk.

This lowest layer was mined for limestone, which was burnt at kiln houses for lime.

[15] Trial drilling for petroleum oil in D’Arcy began in 1919, at a point near the crest of the Cousland Anticline, but this was eventually abandoned as the amount obtained was insufficient.