Districts in the RM area
| District | Main place | Local authority | Sectors | Postcodes |
|---|---|---|---|---|
| RM1 | Romford | Havering | 4 | 517 |
| RM2 | London | Havering | 2 | 268 |
| RM3 | London | Havering | 5 | 923 |
| RM4 | Abridge | Epping Forest | 1 | 160 |
| RM5 | London | Havering | 2 | 380 |
| RM6 | London | Redbridge | 3 | 530 |
| RM7 | Romford | Havering | 5 | 574 |
| RM8 | London | Barking and Dagenham | 3 | 587 |
| RM9 | London | Barking and Dagenham | 4 | 569 |
| RM10 | Dagenham | Barking and Dagenham | 3 | 583 |
| RM11 | London | Havering | 3 | 572 |
| RM12 | Hornchurch | Havering | 4 | 626 |
| RM13 | London | Havering | 4 | 659 |
| RM14 | Upminster | Havering | 4 | 618 |
| RM15 | South Ockendon | Thurrock | 4 | 573 |
| RM16 | Grays | Thurrock | 5 | 698 |
| RM17 | Grays | Thurrock | 3 | 533 |
| RM18 | Tilbury | Thurrock | 2 | 333 |
| RM19 | Purfleet-on-Thames | Thurrock | 1 | 143 |
| RM20 | West Thurrock | Thurrock | 4 | 161 |
Main places in the RM area
- London
- Romford
- Grays
- Hornchurch
- Dagenham
- South Ockendon
- Upminster
- Tilbury
- Aveley
- Chadwell St Mary
- Purfleet-on-Thames
- West Thurrock
- South Stifford
- Chafford Hundred
- East Tilbury
- Barking
- Abridge
- Orsett
- Bulphan
- Stapleford Abbotts
- Southfields
- North Stifford
- Lambourne End
- North Ockendon
- Orsett Heath
- Baker Street
- Wennington
- West Tilbury
- Low Street
- Coldharbour