| SL0 |
IVER |
Iver, Iver Heath, Richings Park, Thorney |
Buckinghamshire |
| SL1 |
SLOUGH |
Slough, Burnham, Cippenham, Farnham Royal, Stoke Poges, Littleworth, Farnham Common |
Slough, Buckinghamshire |
| SL2 |
SLOUGH |
Britwell, Farnham Common, Farnham Royal, Stoke Poges, Egypt, Hedgerley |
Slough, Buckinghamshire |
| SL3 |
SLOUGH |
Langley, Datchet, Colnbrook, Poyle, Horton, Fulmer, George Green, Wexham, part of Richings Park |
Slough, Buckinghamshire, Windsor and Maidenhead |
| SL4 |
WINDSOR |
Water Oakley, Windsor, Old Windsor, Eton, Eton Wick, Clewer, Dedworth, Cranbourne, Winkfield, Dorney, Spital, Oakley Green, Woodside, Boveney, Fifield (east) |
Windsor and Maidenhead, Bracknell Forest, Buckinghamshire, Slough |
| SL5 |
ASCOT |
Ascot, Sunninghill, Sunningdale, North Ascot, South Ascot, Burleigh, Cheapside |
Windsor and Maidenhead, Bracknell Forest |
| SL6 |
MAIDENHEAD |
Maidenhead, Taplow, parts of Cippenham Slough, Bray, Braywick, Cookham, Cookham Dean, Cookham Rise, White Waltham, Hurley, Hurley Bottom, Holyport, Pinkneys Green, Woodlands Park, Furze Platt, Hitcham, Littlewick Green, Burchett's Green, Paley Street, Stud Green, Touchen End, Fifield (west) |
Windsor and Maidenhead, Buckinghamshire |
| SL7 |
MARLOW |
Marlow, Marlow Bottom, Little Marlow, Medmenham, Bisham, Lower Woodend |
Buckinghamshire, Windsor and Maidenhead |
| SL8 |
BOURNE END |
Bourne End, Well End |
Buckinghamshire |
| SL9 |
GERRARDS CROSS |
Gerrards Cross, Chalfont St Peter, Chalfont Common, Horn Hill, Tatling End (west) |
Buckinghamshire, Three Rivers |
| SL60 |
SLOUGH |
Jobcentre Plus |
non-geographic |
| SL95 |
SLOUGH |
Royal Mail |
non-geographic |