Oldham Below Town was, from 1851 until c.1881, a statistical unit used for the gathering and organising of civil registration information, and output of census information. It was a sub-district of the larger registration district of Oldham, in the then registration county of Lancashire, England.
The sub-district has since been abolished and is thus now obsolete. The area which the unit covered having been amalgamated finally (due to urban sprawl and successive legislation) as part of the town of Oldham, in the wider Metropolitan Borough of Oldham, in Greater Manchester.
Unlike neighbouring Oldham Above Town, the area was broadly urban and encompassed several residential districts south and west of Oldham central including Westwood.
Oldham Below Town appears on several England and Wales census transcripts/returns as a place of birth and dwelling for many people of Oldham.