Haconby is a village and civil parish in the South Kesteven district of Lincolnshire, England.

A Roman road, King Street, (from Bourne to just south of Ancaster) passes through the western part of the parish, just west of Stainfield.

[4][5][6] Stainfield Spa, 1.5 miles (2.4 km) to the west of the village, is a chalybeate spring discovered in 1720 by Dr Edward Greathead of Lincoln.

The civil parish extends northwards to just north of the A15-B1177 junction, skirting the southern edge of Dunsby Hall Farm.

It then follows Lane Dike due west which crosses the Car Dyke just north of Cardyke Farm.

The parish boundary follows the southern edge of Dunsby Wood, crossing the Stainfield-Kirkby Underwood road just north of Stainfield Spa.