Historic county of England
Essex
Thames estuary south, creeks and marshes east, open East Saxon country inland.
Essex stretches from the eastern edge of London to a deeply indented North Sea coast of estuaries, saltmarsh and low peninsulas. Chelmsford occupies the central county; Colchester stands further north-east; the Thames-side towns form a dense urban and industrial belt in the south; and Harwich guards the approaches of the Stour in the far north-east.
The contrast between metropolitan west and maritime east is striking, yet most of the county between remains open agricultural country. The coast is not a simple line but a maze of estuaries, islands, mudflats and creeks formed around tidal rivers such as the Blackwater and Crouch. Essex therefore moves from London-edge townscape to some of England’s most expansive estuarine country without losing its underlying geographical coherence.
- Ancient Kingdom of East Saxons
- Formed 6th–7th centuries
- County of Roman towns
- Area: 1,591 sq miles / 4,121 km²
- Population: 2,999,248
- County top: High Wood, 482 ft / 147 m
County geography
Current Census
Contemporary Census profile
England and Wales Census 2021. Detailed contemporary statistics are available in the Geographic County Census Explorer.
- Population density
- 2,064.7 people per sq mi (797.2 people per km²)
- Population
- 3,285,290
A coast made of estuaries
The Thames dominates the southern side of Essex, while the eastern shore is repeatedly cut by tidal rivers. Rather than facing the North Sea along one continuous front, the county reaches into it through long estuaries and low marshy peninsulas.
Fishing, sailing, salt-working, ports and later industry all developed around this unusually intricate relationship between land and water.
From London edge to open country
The western edge of Essex has been heavily affected by the growth of London. Townscape now crosses the geographic county boundary and extends deep into the south-west.
Yet the transition to open country is often sudden. Beyond the metropolitan belt lie farmland, market towns, woodland and long rural horizons. Urban growth has changed the landscape without changing the geographic county beneath it.
Colchester and the northern country
Northern Essex has a different scale and rhythm from the Thames corridor. Colchester anchors the north-east, while the wider country opens towards the Stour and the Suffolk boundary.
Here the county’s Roman inheritance is especially visible, but the surrounding farmland and estuary country are as important to the modern landscape as the ancient city itself.
County questions
Questions about Essex
Do places inside Greater London stop being in Essex?
No. Greater London is a later administrative area. Where it overlies geographic Essex, the underlying county remains Essex.
Where does the name Essex come from?
Essex preserves the name of the East Saxons. The county name therefore carries forward an identity rooted in the early Anglo-Saxon kingdom.
County record
Names and continuity
- Formal name
- County of Essex
- Name note
- Kingdom of the East Saxons
- County day
- 26 October
- Foundation
- c.604
Essex and County of Essex are forms of the county name. The name itself preserves the East Saxon territorial identity from which the county developed.