| Country: | Scotland |
| Official Name: | Polnessan |
| Gaelic Name: | Poll an Easain |
| Static Image: | A713 at Polnessan - geograph.org.uk - 182616.jpg |
| Static Image Caption: | The A713 at Polnessan |
| Population: | 87 |
| Os Grid Reference: | NS 4192 1170 |
| Coordinates: | 55.3749°N -4.4967°W |
| Unitary Scotland: | East Ayrshire |
| Lieutenancy Scotland: | East Ayrshire |
| Constituency Westminster: | Ayr, Carrick and Cumnock |
| Constituency Scottish Parliament: | Carrick, Cumnock and Doon Valley |
| Post Town: | AYR |
| Postcode District: | KA6 |
| Postcode Area: | KA |
Polnessan (Gaelic; Scottish Gaelic: Poll an Easain, pool on the small waterfall) is a small rural village in East Ayrshire, Scotland. Polnessan has a population of 87, and is located a mile north of Patna on the A713 road.
Polnessan has no facilities, and is effectively a long row of council housing. The houses were originally built by Ayr County Council for miners and their families on the Houldsworth pit, a nearby coal mine first sunk by Dalmellington Iron Company in 1900.[1]
There are bus services to Ayr and Dalmellington regularly from Polnessan, run by the Stagecoach bus company, as well as postal facilities.