There is a German national population residing in Alabama, and historically there was a German immigrant population.
In 1866 German immigrants founded Cullman, Alabama.
Wernher von Braun, formerly affiliated with Nazi Germany, helped establish the space industry in Huntsville, Alabama.
German companies began widespread business operations in Alabama when Mercedes-Benz established its first assembly plant in the U.S. in Alabama, Mercedes-Benz U.S. International; in 1993 it selected Vance, a town west of Birmingham, and east of Tuscaloosa.
References
Germans in Alabama Wikipedia(Text) CC BY-SA