This search tool will help you find the state of your ancestors. Enter the place – one or more names will appear with the corresponding states. With the sign next to it you will be redirected to the website www.gemeindeververzeichnis.de – here you will find the complete list of communities (in German) on whose data this search tool relies (many thanks to Uli Schubert, who provided this).
If you are not sure which place it is (if there are multiple locations), do you perhaps know a large city that is near the place? This could help you to identify the place you are searching for.