Chapin 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 northern Franklin County

Franklin County, Iowa

-2010 census:The 2010 census recorded a population of 10,680 in the county, with a population density of . There were 4,894 housing units, of which 4,332 were occupied.-2000 census:...

, Iowa

Iowa

Iowa is a state located in the Midwestern United States, an area often referred to as the "American Heartland". It derives its name from the Ioway people, one of the many American Indian tribes that occupied the state at the time of European exploration. Iowa was a part of the French colony of New...

, United States

United States

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

. It lies along local roads just off U.S. Route 65

U.S. Route 65

U.S. Route 65 is a north–south United States highway in the southern and midwestern United States. The southern terminus of the route is at U.S. Route 425 in Clayton, Louisiana. The northern terminus is at Interstate 35 just south of Interstate 90 in Albert Lea, Minnesota...

, north of the city of Hampton

Hampton, Iowa

Hampton is a city in Franklin County, Iowa, United States. The population was 4,461 at the 2010 census. It is the county seat of Franklin County...

, the county seat

County seat

A county seat is an administrative center, or seat of government, for a county or civil parish. The term is primarily used in the United States....

 of Franklin County. Its elevation is 1,155 feet (352 m), and it is located at 42°50′1"N 93°13′20"W (42.8335814, -93.2221464). Although Chapin 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 50427, which opened on 29 February 1860.