Coordinates: 51°34′N 0°35′E / 51.57°N 0.59°E / 51.57; 0.59

Thundersley is a district in the north west of the Castle Point Borough, in south east Essex, England, about 35 miles east of London.

Thundersley derives from the Old English Þunres lēah = "grove or meadow [perhaps sacred] belonging to the god Thunor". It has also historically been known as Thunresleam.

Thundersley is in a song called A13 by Billy Bragg. It also includes Hadleigh,Pitsea,Basildon,Benfleet,Southend etc.

The area is relatively hilly and high above sea level for Essex, a typical height for the central and eastern part of (old) Thundersley is c. 200 ft (c.65 metres). The environment is partly rural, with large woods and commons, including Thundersley Common, Coombe Wood, Starvelarks Wood, Wyburns Wood, Tile Wood, Pound Wood, West Wood, Shipwrights Wood, Thundersley Glen, The Chase and borders on The Downs (largely in Hadleigh and South Benfleet), and partly suburban, with large areas of housing and small industrial parks. The area has the largest proportion of owner-occupied homes in Britain. The King John School and Sixth Form are situated in Shipwrights Drive. West Wood is managed by Castle Point Wildlife Group.

Julian Andrew Dicks (born 8 August 1968), is an English former professional footballer, manager and former professional golfer.

As a player he was a defender from 1985 to 2002, notably in the Premier League for West Ham United and Liverpool. He also played in the Football League for Birmingham City before ending his career in Non-league football with Canvey Island. He became manager of Wivenhoe Town in 2009, before moving to Grays Athletic later that year. He was capped by both the England U21 and England B sides. He was known as a "hard man" (his nickname was "The Terminator") and tough tackler in possession of a cultured left foot and a fierce shot in regular demand as a penalty and free-kick taker. He scored 10 goals for West Ham in the 1995–96 season, which is the best return for a defender in the Premier League. He was voted West Ham's player of the year four times between 1990 and 1997.

He started his footballing career at Birmingham City, joining them as an apprentice in 1985, and had turned professional when West Ham bought him for £300,000 in 1988 and gave him the chance of First Division football that Birmingham's relegation in 1986 had denied him.