Essex Leopards ended in 2003.
Essex Leopards was created in 1994.
Essex Records ended in 1956.
Essex Regiment ended in 1958.
Kingdom of Essex ended in 812.
Essex Railroad ended in 1884.
Essex County Railroad ended in 1880.
Essex Road railway station ended in 1975.
Essex is a whole county. There would be at least one hour's drive from one end of Essex to the other, so you would need to specify the town in Essex.
East Essex - UK Parliament constituency - ended in 1885.
Essex County Natural History Society ended in 1848.
North Essex - UK Parliament constituency - ended in 2010.
THere are a couple of resevoirs in Essex, and there is also South End-on-sea, which is on the mouth of the Thames, so there's a lot of water there.