| Postcode district | Post town | Coverage | Local authority area(s) |
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| SY1 | SHREWSBURY | Shrewsbury (north and town centre) | Shropshire |
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| SY2 | SHREWSBURY | Shrewsbury (east) | Shropshire |
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| SY3 | SHREWSBURY | Shrewsbury (south and west), Bayston Hill | Shropshire |
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| SY4 | SHREWSBURY | Baschurch, Bomere Heath, Nesscliffe, Shawbury, Wem | Shropshire |
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| SY5 | SHREWSBURY | Atcham, Cressage, Criggion, Condover, Minsterley, Pontesbury, Ratlinghope, Westbury, Wroxeter | Shropshire, Powys |
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| SY6 | CHURCH STRETTON | Church Stretton, Cardington | Shropshire |
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| SY7 | BUCKNELL | Bucknell, Lingen | Shropshire, Herefordshire |
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| CRAVEN ARMS | Craven Arms, Clun Valley, Diddlebury, Leintwardine, Munslow, Tugford |
| LYDBURY NORTH | Lydbury North | Shropshire |
| SY8 | LUDLOW | Ludlow, Brimfield, Clee Hill, Culmington, Leinthall Starkes, Richard's Castle, Stoke St. Milborough | Shropshire, Herefordshire |
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| SY9 | BISHOPS CASTLE | Bishop's Castle, Wentnor | Shropshire |
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| SY10 | OSWESTRY | Oswestry (outskirts), Gobowen, Llansilin, Llangedwyn, Llanrhaeadr-ym-Mochnant, Pen-y-bont-fawr, Llanwddyn | Shropshire, Powys |
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| SY11 | OSWESTRY | Oswestry (most of), St Martin's, West Felton | Shropshire |
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| SY12 | ELLESMERE | Ellesmere, Dudleston Heath (Criftins), Welshampton, Lyneal, Colemere, Cockshutt, English Frankton, Tetchill, Hordley, Bagley | Shropshire |
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| SY13 | WHITCHURCH | Whitchurch, Whixall | Shropshire |
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| SY14 | MALPAS | Malpas, Tilston, No Man's Heath, Bickley, Hampton, Shocklach, Bulkeley, Bickerton, Cuddington Heath, Cholmondeley, Threapwood, Barton, Duckington | Cheshire West and Chester, Cheshire East, Wrexham |
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| SY15 | MONTGOMERY | Montgomery, Abermule, Chirbury, Church Stoke | Powys, Shropshire |
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| SY16 | NEWTOWN | Newtown, Tregynon, Bettws Cedewain | Powys |
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| SY17 | CAERSWS | Caersws, Trefeglwys, Carno, Llanwnnog, Pontdolgoch, Clatter | Powys |
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| LLANDINAM | Llandinam |
| SY18 | LLANIDLOES | Llanidloes, Llangurig, Van, Tylwch | Powys |
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| SY19 | LLANBRYNMAIR | Llanbrynmair, Llan, Bont Dolgadfan, Dolfach, Talerddig, Staylittle, Pennant, Dylife | Powys |
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| SY20 | MACHYNLLETH | Machynlleth, Corris | Powys, Gwynedd |
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| SY21 | WELSHPOOL | Welshpool, Marton, Stockton | Powys, Shropshire |
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| SY22 | LLANFECHAIN | Llanfechain | Powys, Shropshire |
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| LLANFYLLIN | Llanfyllin |
| LLANSANFFRAID | Llansantffraid-ym-Mechain |
| LLANYMYNECH | Llanymynech |
| MEIFOD | Meifod |
| SY23 | ABERYSTWYTH | Aberystwyth, Llanbadarn Fawr, Penparcau | Ceredigion, Powys |
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| LLANON | Llanon |
| LLANRHYSTUD | Llanrhystud |
| SY24 | BORTH | Borth | Ceredigion |
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| BOW STREET | Bow Street, Pen-y-garn, Rhydypennau, Llandre |
| TALYBONT | Talybont |
| SY25 | YSTRAD MEURIG | Ystrad Meurig | Ceredigion, Powys |
|---|
| TREGARON | Tregaron |
| SY99 | SHREWSBURY | Jobcentre Plus | non-geographic |
|---|