Historic Counties Institute

Geography • Identity • Continuity

Reference, evidence, and public education for the historic counties.

Historic counties are the enduring geography. Councils are administration; lieutenancies are ceremonial – neither defines the counties.

County Dossier

Dorset

A county of chalk downs, ancient hillforts, coast.

Dorset is a maritime county on England’s south coast, renowned for its extraordinary variety of landscapes. Poole thrives thanks to Poole Harbour, a vast and deep natural harbour.

Dorset county reference map

At a glance

Dorset at a glance

A county of chalk downs, ancient hillforts, coast.

Nation England
Formal name County of Dorset
Foundation c.841
County Day 1 June
  • Dornsǣt: “dwellers of Dorn”
  • Wessex shire by the 8th century
  • Domesday (1086): Dornescire
  • Area: 1,005 sq miles / 2,603 km²
  • Population: 543,296
  • County top: Lewesdon Hill 915 ft / 279 m

County Geography

Dorset faces the English Channel to the south and meets Devon to the west, Somerset to the north-west, Wiltshire to the north-east, and Hampshire to the east. Its shape is organised by downland, harbour water, and the projecting Purbeck side rather than by one single inland line.

Coast, chalk ridge, and harbour give Dorset a strong territorial form.

Map Reference

View Dorset on the map

Dorset is the county. The map also shows lieutenancies and council areas that use the county name.

County Lieutenancy Council
Dorset county map preview Open Dorset in the Interactive Map

Open Dorset in the Interactive Map

Places and routes

Dorchester, Weymouth, Poole, Sherborne, and Swanage show the county from its inland centre and west-east route country to its harbour, peninsula, and south-coast frontage.

Connections

The county’s routes run between Dorchester, the harbour side, the west-country road, and the coast. Movement follows Dorset’s downland, harbour, and shore rather than a single inland axis.

Dorset landscape or key location
Durdle Door, Dorset.

Names

  • Dorset
  • County of Dorset
  • Dorsetshire

County Reference

Explore Dorset

Open the map to explore Dorset, or return to the county index to browse other counties.