Essex is an unincorporated community

Unincorporated area

In law, an unincorporated area is a region of land that is not a part of any municipality.To "incorporate" in this context means to form a municipal corporation, a city, town, or village with its own government. An unincorporated community is usually not subject to or taxed by a municipal government...

 located on the east side of Rush Creek

Rush Creek

-Places:* Rush Creek * Rush Creek * Rush Creek Township, Fairfield County, Ohio-Waterways:*Rush Creek , a tributary of the Kishwaukee River in Illinois...

 in the central part of Jackson Township

Jackson Township, Union County, Ohio

Jackson Township is one of the fourteen townships of Union County, Ohio, United States. The 2000 census found 914 people in the township.-Geography:Located in the northwestern corner of the county, it borders the following townships:...

, Union County

Union County, Ohio

Union County is a county located in the US state of Ohio. As of the 2010 census, the population was 52,300. Increasingly becoming more of a suburban county, the population was estimated at 47,234 in 2007 by the U.S. Census Bureau...

, Ohio

Ohio

Ohio is a Midwestern state in the United States. The 34th largest state by area in the U.S.,it is the 7th‑most populous with over 11.5 million residents, containing several major American cities and seven metropolitan areas with populations of 500,000 or more.The state's capital is Columbus...

, United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. It is located at 40°28′57"N 83°18′57"W, at the intersection of State Routes 37 and 739

Ohio State Route 739

State Route 739 is a long north–south state highway in the central portion of the U.S. state of Ohio. The route's southern terminus is at an interchange with U.S. Route 33 nearly northeast of North Lewisburg at an interchange that doubles as the eastern terminus of SR 287...

.

The Rush Creek Post Office was established in Essex on July 13, 1848. As of 1877, Essex contained two stores, a school-house, and a sawmill. The Post Office changed its name to Rushcreek on November 3, 1894, and was discontinued on June 29, 1907. The mail service is now sent through the Richwood

Richwood, Ohio

Richwood is a village in Claibourne Township, Union County, Ohio, United States. The population was 2,156 at the 2000 census.-History:The town of Richwood was laid out in 1832, by Philip Plummer. In 1834, road work was completed, and all the roads going into the town were gravelled...

Post Office.