Here are helpful links for those researching their German Genealogy

Missouri

Missouri State Archives – http://www.sos.mo.gov/records/

State Historical Society of Missouri  http://shs.umsystem.edu/index.shtml

Franklin County

Four Rivers Genealogical Society – http://4riversgen.org/

Gasconade County

Gasconade County Library and Research Center – https://www.gasconadecountyhistoricalsociety.com/content/default/?id=5

St. Charles County

St. Charles County Historical Society – http://scchs.org/

Lindenwood University Archives – http://library.lindenwood.edu/archive/

St. Louis City and County

Missouri History Museum – http://mohistory.org/lrc-home holds a huge amount of family, business, and society collections that are helpful for families of the St. Louis Area

Missouri State Archives – St. Louis  http://www.sos.mo.gov/archives/resources/msastl/

St. Louis County Library – http://www.slcl.org/genealogy  is a great place to research your St. Louis area Germans! They also hold the St. Louis Genealogical Society and the National Genealogical Society Collections.

St. Louis Public Library – http://stlouispubliclibrary.net/slpl/library/article240098545.asp

St. Louis Mercantile Library – http://www.umsl.edu/mercantile/

Western Manuscripts – http://www.umsl.edu/~whmc/guides/photos/41/

Warren County

Warren County Historical Society – http://warrencountymohistory.com/