Where Is Essex County? All 5 Essex Counties on a Map

Where is Essex County?

5 Essex Counties in 5 states · 1.8 million people (2025)

There are 5 counties named Essex County in the United States, in Massachusetts, New Jersey, New York, Vermont and Virginia. The most populous is Essex County, New Jersey (county seat: Newark), with 896,379 people in 2025. 5 of them are named after Essex, ceremonial county in England (use Q21272241 for administrative non-metropolitan county).

All 5 Essex Counties

Sorted by state. Each link opens the county's map.

State	County seat	Population 2025	Land area (sq mi)	Established	Named after
Essex County, Massachusetts	Salem	826,653	493	1643	Essex
Essex County, New Jersey	Newark	896,379	126	1683	Essex
Essex County, New York	Elizabethtown	36,438	1,794	1799	Essex
Essex County, Vermont	Guildhall	6,051	662	1792	Essex
Essex County, Virginia	Tappahannock	10,654	257	1692	Essex

Questions about Essex Counties

How many Essex Counties are there?

There are 5 Essex Counties in the United States, in Massachusetts, New Jersey, New York, Vermont and Virginia.

Which Essex County is the largest?

By population, Essex County, New Jersey (896,379 people in 2025). By land area, Essex County, New York (1,794 sq mi).

Which Essex County is the oldest?

Essex County, Massachusetts, established in 1643. The newest is Essex County, New York (1799).

Why are there so many Essex Counties?

5 of the 5 are named after Essex, ceremonial county in England (use Q21272241 for administrative non-metropolitan county). Many counties took their names from the same founders, presidents and generals as new states were organized.

How do I find out which Essex County an address is in?

Open the county map of the state: it has a search box for cities, towns and ZIP codes. On a phone, the "what county am I in" tool on our sister site uses your location.

What county am I in? →