Postcode district boundaries:
|Postcode area name|
|Statistics as at May 2020|
The OL postcode area, also known as the Oldham postcode area, is a group of sixteen postcode districts in north-west England, within seven post towns. These cover eastern Greater Manchester (including Oldham, Rochdale, Ashton-under-Lyne, Heywood and Littleborough), plus small parts of east Lancashire (including Bacup) and western West Yorkshire (including Todmorden).
The approximate coverage of the postcode districts are:
|Postcode district||Post town||Coverage||Local authority area(s)|
|OL1||OLDHAM||Chadderton, Higginshaw, Oldham||Oldham|
|OL2||OLDHAM||Heyside, Royton, Shaw||Oldham|
|OL3||OLDHAM||Delph, Denshaw, Diggle, Dobcross, Greenfield, Uppermill||Oldham|
|OL4||OLDHAM||Austerlands, Grasscroft, Grotton, Lees, Lydgate, Oldham, Scouthead, Springhead, Waterhead||Oldham|
|OL5||ASHTON-UNDER-LYNE||Mossley, Mossley Cross||Tameside|
|OL6||ASHTON-UNDER-LYNE||Ashton-under-Lyne (centre and east)||Tameside|
|OL9||OLDHAM||Chadderton, Oldham, Westwood, Freehold||Oldham|
|OL11||ROCHDALE||Rochdale (south), Ashworth, Balderstone, Castleton, Norden||Rochdale|
|OL12||ROCHDALE||Rochdale (north), Buckley, Facit, Great Howarth, Healy, Hurstead, Shawforth, Wardle, Whitworth||Rochdale, Rossendale|
|OL13||BACUP||Bacup, Britannia, Stacksteads||Rossendale|
|OL14||TODMORDEN||Cornholme, Todmorden, Eastwood, Walsden||Calderdale|
|OL15||LITTLEBOROUGH||Littleborough, Shore, Smithybridge, Summit||Rochdale|
|OL16||ROCHDALE||Rochdale (east), Burnedge, Firgrove, Hurstead, Milnrow, Smallbridge, Thornham||Rochdale|
- "ONS Postcode Directory Version Notes" (ZIP). National Statistics Postcode Products. Office for National Statistics. May 2020. Table 2. Retrieved 19 June 2020. Coordinates from mean of unit postcode points, "Code-Point Open". OS OpenData. Ordnance Survey. February 2012. Retrieved 21 April 2012.
- Royal Mail, Address Management Guide, (2004)
- "Non Geographic Codes" (PDF). Royal Mail Address Management Unit. July 2012. Archived from the original (PDF) on 16 September 2012. Retrieved 20 December 2012.
- "New sectors and localities to 14 December 2012" (PDF). Royal Mail Address Management Unit. 20 December 2012. Archived from the original (PDF) on 2 February 2015. Retrieved 20 December 2012.