Kemsley, once a separate village, is now a suburb of Sittingbourne in Kent, England.

According to Asserius Menevensis in his contemporary survey, the Danes built a fortress or castle here in 893 at a place called 'Kemsley downe'.

[3] At the end of the 19th century, the site of the village was simply a row of cottages beside a brick works,[4] located close to the remains of the medieval fortified manor house Castle Rough.

In 1924, with expansion impossible at the old Sittingbourne Paper Mills, owner Edward Lloyd built the new Kemsley Paper Mill, which served by a creek allowed the direct importation of raw materials to the site.

The narrow gauge industrial railway which served the factory is now the preserved Sittingbourne and Kemsley Light Railway, a tourist attraction.