Chelmsford is a city in the City of Chelmsford district in the county of Essex, England. It is the county town of Essex and one of three cities in the county, along with Southend-on-Sea and Colchester. It is located 30 miles (50 kilometres) north-east of London at Charing Cross and 22 miles (35 kilometres) south-west of Colchester.

In the United Kingdom and Ireland, a county town is the most important town or city in a county. It is usually the location of administrative or judicial functions within a county and the place where the county's members of Parliament are elected. Following the establishment of the English county councils in 1889, the headquarters of the new councils were usually located in the county town of each county.

Essex is a county in the East of England. One of the home counties, it borders Suffolk and Cambridgeshire to the north, the North Sea to the east, Hertfordshire to the west, Kent across the estuary of the River Thames to the south, and Greater London to the south and south-west.

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