Alvada 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...

 in western Big Spring Township

Big Spring Township, Seneca County, Ohio

Big Spring Township is one of the fifteen townships of Seneca County, Ohio, United States. The 2000 census found 1,791 people in the township, 1,565 of whom lived in the unincorporated portions of the township.-Geography:...

, Seneca County

Seneca County, Ohio

Seneca County is a county located in the state of Ohio, United States. As of the 2010 census, the population was 56,745. Its county seat is Tiffin and it is named for the Seneca Indians.The Tiffin Micropolitan Statistical Area includes all of Seneca County....

, 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...

. Although it is unincorporated, it has a post office

Post office

A post office is a facility forming part of a postal system for the posting, receipt, sorting, handling, transmission or delivery of mail.Post offices offer mail-related services such as post office boxes, postage and packaging supplies...

, with the ZIP code

ZIP Code

ZIP codes are a system of postal codes used by the United States Postal Service since 1963. The term ZIP, an acronym for Zone Improvement Plan, is properly written in capital letters and was chosen to suggest that the mail travels more efficiently, and therefore more quickly, when senders use the...

 of 44802. It is located along the concurrency

Concurrency (road)

A concurrency, overlap, or coincidence in a road network is an instance of one physical road bearing two or more different highway, motorway, or other route numbers...

 of U.S. Route 23 and State Route 199.

Even though it is located in Seneca County there are people as far west as State rout 330 in hancock County listed as being in Seneca because of there mailing address but they do have Hancock County phone numbers.