1. Leipzig: Leipzig is one of the cheapest cities to study in Germany. The rent is as low as 264 euros and living here is generally affordable for students.

2. Jena: Jena is a small city with just 100,000 inhabitants. The living cost here is quite affordable, and rent is around 265 euros.

3. Frankfurt (Oder): This city is very close to the Polish border and separated by the Oder river. It is very affordable for students and strategically located as you can take a trip to Berlin by the weekends, which is less than an hour away or to Warsaw, the capital city of Poland, which is equally close by.

4. Halle/Salle: Halle has one of the most beautiful university squares in Europe and home to Martin Luther University. The rent here is 268 euros and living here as very cheap.

5. Krefeld: Krefeld with a population of 230,000 is close to Düsseldorf, one of the biggest cities in Germany. This city is generally cheap and with an average of 450 euro, you can get a decent one bedroom flat in the city centre.