Koeltztown 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 southern Osage County

Osage County, Missouri

Osage County is a county located in the U.S. state of Missouri. The county was named for the Osage River. As of 2000, the population was 13,062. Its county seat is Linn. The center of population of Missouri is located in Osage County, in the city of Westphalia .Osage County is part of the...

, Missouri

Missouri

Missouri is a US state located in the Midwestern United States, bordered by Iowa, Illinois, Kentucky, Tennessee, Arkansas, Oklahoma, Kansas and Nebraska. With a 2010 population of 5,988,927, Missouri is the 18th most populous state in the nation and the fifth most populous in the Midwest. It...

, United States

United States

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

. It is located about seventeen miles southeast of Jefferson City

Jefferson City, Missouri

Jefferson City is the capital of the U.S. state of Missouri and the county seat of Cole County. Located in Callaway and Cole counties, it is the principal city of the Jefferson City metropolitan area, which encompasses the entirety of both counties. As of the 2010 census, the population was 43,079...

 and is one of the oldest settlements in Osage County. Founded in 1858, the community was named for its first postmaster, August Koeltze. While not Catholic, Koeltz donated land for a Catholic parish to encourage enough settlers to the area to establish a town around St. Boniface Catholic Church.

During the American Civil War

American Civil War

The American Civil War was a civil war fought in the United States of America. In response to the election of Abraham Lincoln as President of the United States, 11 southern slave states declared their secession from the United States and formed the Confederate States of America ; the other 25...

, a few raiders came through but there no major battles in the area. Most European settlers were German immigrants, who arrived in greatest number in the mid- to late-19th century.