| Postal district |
Post town |
Coverage |
Local
authority |
| NN1 |
NORTHAMPTON |
Northampton |
Northampton |
| NN2 |
NORTHAMPTON |
Kingsthorpe |
Northampton |
| NN3 |
NORTHAMPTON |
Boothville, Moulton, Weston Favell |
Daventry (district),
Northampton |
| NN4 |
NORTHAMPTON |
Brackmills, East Hunsbury, West Hunsbury |
Northampton |
| NN5 |
NORTHAMPTON |
Duston, New Duston |
Northampton |
| NN6 |
NORTHAMPTON |
Brixworth, Earls Barton, Ecton, Long Buckby Spratton, Sywell, West Haddon. |
Daventry (district),
Northampton,
Wellingborough (borough) |
| NN7 |
NORTHAMPTON |
Blisworth, Bugbrooke, Harpole, Harlestone, Nether Heyford, Roade, Weedon Bec, Dodford |
Daventry (district),
South Northamptonshire |
| NN8 |
WELLINGBOROUGH |
Wellingborough, Wilby |
Wellingborough (borough) |
| NN9 |
WELLINGBOROUGH |
Chelveston, Finedon, Great Harrowden, Irthlingborough, Raunds |
East Northamptonshire,
Wellingborough (borough) |
| NN10 |
RUSHDEN |
Higham Ferrers, Rushden, Wymington |
East Northamptonshire |
| NN11 |
DAVENTRY |
Braunston, Daventry, Greens Norton, Hinton |
Daventry (district) |
| NN12 |
TOWCESTER |
Silverstone, Towcester, Weston. |
South Northamptonshire |
| NN13 |
BRACKLEY |
Brackley, Croughton, Farthinghoe, Hinton-in-the-Hedges. |
South Northamptonshire |
| NN14 |
KETTERING |
Broughton, Desborough, Geddington, Isham, Pytchley, Rothwell, Thorpe Malsor, Thrapston. |
East Northamptonshire,
Kettering (borough) |
| NN15 |
KETTERING |
Burton Latimer, Barton Seagrave |
Kettering (borough) |
| NN16 |
KETTERING |
Kettering |
Kettering (borough) |
| NN17 |
CORBY |
Bulwick, Corby. |
Corby,
East Northamptonshire |
| NN18 |
CORBY |
Great Oakley, Little Oakley |
Corby |
| NN29 |
WELLINGBOROUGH |
Bozeat, Great Doddington, Irchester, Podington, Wollaston |
Bedford (borough)
Wellingborough (borough) |
