Only three clubs? No way, more like getting on for fifty.
I think our English non-league system is second to none. I love it.

http://en.wikipedia.org/wiki/East_Thurrock_United_F.C. Formed: 1969

http://en.wikipedia.org/wiki/Eton_Manor_F.C. Formed: 1901

http://en.wikipedia.org/wiki/Hornchurch_F.C. (1923)
http://en.wikipedia.org/wiki/A.F.C._Hornchurch

http://en.wikipedia.org/wiki/Aveley_F.C. (1927)

http://en.wikipedia.org/wiki/Dagenham_F.C. (1949)

http://en.wikipedia.org/wiki/Tilbury_F.C. (1900)

http://en.wikipedia.org/wiki/Canvey_Island_F.C. (1926)

http://www.concordrangers.co.uk/ (1967)

http://en.wikipedia.org/wiki/Romford_F.C. (1876)

http://en.wikipedia.org/wiki/Hullbridge_Sports_F.C. (1945)

http://en.wikipedia.org/wiki/Billericay_Town_F.C. (1880)

http://en.wikipedia.org/wiki/Brentwood_Town_F.C.

Football in the town of Brentwood goes back to the 19th century when the original Brentwood Town reached the quarter finals of the FA Cup where they were beaten 3-1 by the eventual winners Blackburn Rovers.

http://en.wikipedia.org/wiki/Bowers_%26_Pitsea_F.C. (1947)

http://en.wikipedia.org/wiki/Sawbridgeworth_Town_F.C. (1897)

http://en.wikipedia.org/wiki/Barking_F.C. (1865)
Yes, Barking is in Essex.

http://en.wikipedia.org/wiki/Barkingside_F.C. (1889)

http://en.wikipedia.org/wiki/Southend_United_F.C. (1906)

http://en.wikipedia.org/wiki/Burnham_Ramblers_F.C. (1900)

http://en.wikipedia.org/wiki/Southend_Manor_F.C. (1955)

http://en.wikipedia.org/wiki/Stansted_F.C. (1937)

http://en.wikipedia.org/wiki/Kelvedon_Hatch_F.C. (1920)

http://en.wikipedia.org/wiki/Manford_Way_F.C. (1946)

http://www.mountnessingfc.co.uk/index.php?about (1922)

http://en.wikipedia.org/wiki/White_Ensign_F.C.(1951)

The White Ensign club was formed in 1951 as a club for former members of the Royal Navy. The name refers to the Navy’s White Ensign flag.

http://en.wikipedia.org/wiki/Roydon%2C_Essex#Football_club (1901)

http://en.wikipedia.org/wiki/Basildon_United_F.C. (1967)

http://www.basildontown.co.uk/ (1946)

http://en.wikipedia.org/wiki/Great_Wakering_Rovers_F.C. (1919)

http://www.maldontownfc.co.uk/ (1946)

http://www.tiptreeunited.com/ (1933)

http://www.saffronwaldentownfc.com/ (1872)

The oldest Senior Football Club in Essex. Founded in 1872, Saffron Walden are the oldest club in Essex still in existence and the 23rd oldest in the world.

http://www.wmfc.co.uk/clubhistory.html (1962)

http://www.writtlefc.co.uk/ (1902)

http://en.wikipedia.org/wiki/Chelmsford_City_F.C. (1878)

The current team was founded as a professional team in 1938, after an amateur team played at the New Writtle Street ground between 1922 and 1938 which was formed in 1878

http://en.wikipedia.org/wiki/Braintree_Town (1898)

http://en.wikipedia.org/wiki/Heybridge_Swifts_F.C. (1880)

http://en.wikipedia.org/wiki/Harlow_Town_F.C. (1879)

http://en.wikipedia.org/wiki/Clacton_Town_F.C. (1892)

http://en.wikipedia.org/wiki/Colchester_United_F.C. (1867)

Colchester Town F.C., nicknamed ‘The Oystermen’, were the local side, established in 1867 and playing at Layer Road from 1909 until 1937, when they were dissolved. The stadium was originally owned by the army.

Just as an aside…
Cray Wanderers F.C. are an English semi-professional football club. It is one of the oldest football clubs in the world. It was established in 1860 in the twin villages of St. Mary Cray and St Paul’s Cray, both near Orpington in the postal County of Kent. They currently play their home matches at Bromley’s Hayes Lane ground (capacity 5,000).

http://en.wikipedia.org/wiki/Grays_Athletic_F.C.

Grays United was the predecessor of the modern Grays and was considered one of the oldest clubs in the world. Grays Athletic were established in 1890 and became founder members of the Athenian League.

http://en.wikipedia.org/wiki/Halstead_Town_F.C. (1879)

http://www.halsteadtownfc.com/ (1879)

http://en.wikipedia.org/wiki/Ilford_F.C.

The first Ilford F.C. were a famous amateur side, founded in 1881 playing in the Southern League and FA Trophy. They played at Lynn Road in Newbury Park, the ground was developed as Dellow Close (named after R Dellow - an Ilford FC player of the 1930’s) until they merged with Leytonstone F.C. to form Leytonstone and Ilford

http://en.wikipedia.org/wiki/Redbridge_F.C. (1959)

http://en.wikipedia.org/wiki/Wivenhoe_Town_F.C. (1925)

http://en.wikipedia.org/wiki/Witham_Town_F.C. (1946)

Teams called Witham Town have been in existence since the mid 19th Century. The original club was disbanded in 1914 due to the First World War and reformed after the conflict in 1918.

http://en.wikipedia.org/wiki/Waltham_Abbey_F.C. (1944)

http://en.wikipedia.org/wiki/Sawbridgeworth_Town_F.C. (1897)

Any theories on why Canvey’s crowds were so low? Is it too near to Southend/London?