| Country: | England |
| Official Name: | Kelmarsh |
| Coordinates: | 52.4094°N -0.9166°W |
| Population: | 208 |
| Population Ref: | (2011) |
| Unitary England: | West Northamptonshire |
| Lieutenancy England: | Northamptonshire |
| Region: | East Midlands |
| Constituency Westminster: | Kettering |
| Post Town: | Northampton |
| Postcode District: | NN6 |
| Postcode Area: | NN |
| Dial Code: | 01604 |
| Os Grid Reference: | SP7379 |
| Static Image Name: | St Denys, Kelmarsh.JPG |
| Static Image Caption: | St Denys' Church |
Kelmarsh is a village and civil parish in West Northamptonshire, England.[1] [2] The population (including Haselbech) of the civil parish at the 2011 Census was 208.[3] The village is on the A508, close to its junction with the A14 about 5miles south of Market Harborough and 11miles north of Northampton.[1]
The village’s name probably means, 'marsh marked out by poles or posts'. The place-name is identical to Chelmarsh, Shropshire; the initial K- reflects Old Norse influence.[4]
Kelmarsh Hall is its principal building.
Kelmarsh Tunnel is a former railway tunnel at Kelmarsh now open as part of the Brampton Valley Way.
Between 1859 and 1960 the village was served by Kelmarsh railway station about 2miles north-east of the village running trains south to Northampton and north to Market Harborough.