Portesham was a small railway station on the Abbotsbury branch railway in the west of the English county of Dorset. Opened on 9 November 1885 by the Abbotsbury Railway, it was sited across the fields from Portesham village not far from an underbridge carrying the line across the Weymouth to Abbotsbury road at a skew angle. Just to the east of the station an incline provided access to quarries near the Hardy Monument.