The Lutheran Church–Missouri Synod (LCMS), often referred to simply as the Missouri Synod, is a traditional, confessional Lutheran denomination in the United States. With 2.1 million members, it is both the eighth-largest Protestant denomination and the second-largest Lutheran body in the U.S., the largest being Evangelical Lutheran Church in America. The LCMS was organized in 1847 at a meeting in Chicago, Illinois, as the German Evangelical Lutheran Synod of Missouri, Ohio, and Other States, a name which reflected the geographic locations of the founding congregations. The LCMS is headquartered in Kirkwood, Missouri.
The LCMS has congregations in all 50 U.S. states and two Canadian provinces, but over half of its members are located in the Midwest. It is a member of the International Lutheran Council and is in altar and pulpit fellowship with most of that group's members. The LCMS is divided into 35 districts—33 of which are geographic and two (the English and the SELC) non-geographic. The current president is the Rev. Matthew C. Harrison, who took office on September 1, 2010.
The Missouri Synod emerged from several communities of German Lutheran immigrants during the 1830s and 1840s. In Indiana, Ohio, and Michigan, isolated Germans in the dense forests of the American frontier were brought together and ministered to by missionary F. C. D. Wyneken. A movement of Confessional Lutherans under Martin Stephan created a community in Perry County, Missouri, and St. Louis, Missouri. In Michigan and Ohio, missionaries sent by Wilhelm Löhe ministered to scattered congregations and founded German Lutheran communities in Frankenmuth, Michigan, and the Saginaw Valley of Michigan.