Districts in the SG area
| District | Main place | Local authority | Sectors | Postcodes |
|---|---|---|---|---|
| SG1 | Stevenage | Stevenage | 7 | 1,284 |
| SG2 | Stevenage | Stevenage | 4 | 852 |
| SG3 | Knebworth | North Hertfordshire | 1 | 206 |
| SG4 | Hitchin | North Hertfordshire | 4 | 906 |
| SG5 | Hitchin | North Hertfordshire | 5 | 952 |
| SG6 | Letchworth | North Hertfordshire | 5 | 978 |
| SG7 | Baldock | North Hertfordshire | 2 | 442 |
| SG8 | Royston | South Cambridgeshire | 7 | 1,299 |
| SG9 | Buntingford | East Hertfordshire | 2 | 515 |
| SG10 | Hadham Cross | East Hertfordshire | 1 | 108 |
| SG11 | Puckeridge | East Hertfordshire | 2 | 379 |
| SG12 | Ware | East Hertfordshire | 5 | 939 |
| SG13 | Hertford | East Hertfordshire | 3 | 532 |
| SG14 | Hertford | East Hertfordshire | 3 | 625 |
| SG15 | Arlesey | Central Bedfordshire | 1 | 120 |
| SG16 | Lower Stondon | Central Bedfordshire | 1 | 196 |
| SG17 | Shefford | Central Bedfordshire | 2 | 403 |
| SG18 | Biggleswade | Central Bedfordshire | 4 | 764 |
| SG19 | Sandy | Central Bedfordshire | 4 | 679 |