You can find active Jewish communities in every German city. Germany’s Jewish population is currently at around 119,000, mostly
due to the large immigration of Jews from the former soviet union.
It’s also a shock to see how many flights are there every day from various German cities (Frankfurt, Munich, Berlin, Dusseldorf, and Cologne) to Tel Aviv each day. Looking at flightstats.com today – shows two Lufthansa and an El Al flight from Frankfurt, and from Munich, 4 flights, operated by Lufthansa, El Al, Air Berlin, and TUIfly.
There is an yeshiva in Berlin, and many of their students go on to
learn in mainstream yeshivas in Israel, e.g. Mir, as well as a seminary for girls.
A few years ago, there were twice weekly flights between Tel Aviv and Memmingen, Germany (an airport near Munich) operated by TUIfly, and I was on the very first flight from Tel Aviv. At arrival in Germany, we were greeted by a German marching band, and a large group of Germans holding Israeli flags, and giving a rose to every disembarking passenger.
godaven.com shows 31 minyan listings for Germany.