Newly Formed Companies in the Dorchester Area
The geography of DT is built from the places beneath it rather than from the area name alone. Among the names that give the area its shape are Dorchester, Weymouth, Sherborne, Blandford Forum, Bridport and Sturminster Newton.
The DT area is shaped by the South West, with the places already mentioned linking market towns, coastal resorts, rural communities, tourism, farming, harbours and long-distance routes towards the peninsula.
The strongest concentrations of company activity in DT include districts such as DT1, DT4, DT9, DT11, DT6, but the postcode area itself is broader than those locations alone.
Companies House records linked to DT postcodes sit alongside the area's towns, districts and local landmarks. As of June 2026, DT is one of the smaller postcode areas by company numbers, ranking 108th out of 128 with 13,145 companies.
The area may be quieter in company-number terms, but it remains a useful geographic reference for newly formed companies associated with its postcodes.
When a company is registered, its registered office address is the publicly visible location of the company and the company has to legally be able to receive post at this address. Over 2,000 companies every day (sometimes over 3000) get formed. These are in England, Scotland, Wales and Northern Ireland.
We analyse whether a registered office has a valid UK postcode that we can get grid co-ordinates for distance calculations and make sure the company has not closed down since it formed. You can then contact these people in the Dorchester (DT) area, who may be interested in receiving your marketing message offering your services under the legitimate interest rules of GDPR (assuming you are marketing to companies who you feel have a potential interest in your services, either geographically or by category). Marketing is by post because it is a brand new company that won't have a business telephone number or business email address (and even if they have, its not part of the data collected and made available by Companies House)
Dorchester is made up of the following towns and villages
Postcode Districts in Dorchester (DT)
| District | Description | Region |
|---|---|---|
| DT1 | Dorchester | West Dorset |
| DT10 | Sturminster Newton | North Dorset |
| DT11 | Blandford Forum | North Dorset |
| DT2 | Dorchester | West Dorset |
| DT3 | Weymouth | Weymouth and Portland |
| DT4 | Weymouth | Weymouth and Portland |
| DT5 | Portland | Weymouth and Portland |
| DT6 | Bridport | West Dorset |
| DT7 | Lyme Regis | West Dorset |
| DT8 | Beaminster | West Dorset |
| DT9 | Sherborne | West Dorset |