The following rabbis were active in the community: 

1805-1821 Joseph Mayer Schnaittach(er); 1827 - 1835 Seligmann Grünwald; 1836-1840 Dr. Naphtali Frankfurter; 1840  Maier Hirsch Landauer; 1840-1841 Dr. Abraham Wälder; 1841-1860 Dr. Maier Samuel Hirsch; 1860-1900 Menko Berlinger; 1900-1914 Dr. Jakob Berlinger 

On the Markenhof estate near Kirchzarten Alexander Moch from Schwanau-Nonnenweier operated a farm since 1919, which also served as a hachshara, i.e. preparation for immigration to Palestine. The Markenhof is considered the "first kibbutz of German Jews" (Ruben Frankenstein). The teaching estate was financed by the Jewish entrepreneur Konrad Goldmann. He also established with his funds a synagogue on the farm, whose windows were designed by Friedrich Adler from Laupheim.

The Jewish inhabitants of Singen initially belonged to the synagogue community of Constance. In the course of the 1920s, their number increased to such an extent that a congregation foundation and the construction of a synagogue were seriously considered. In order not to always have to travel the long distances to the synagogues in Gailingen and Constance, they first set up a prayer hall. Salo Schärf, owner of the furniture store "Roll and Co.", made the rooms above his store in the Poststraße 19 and 21 (today's Freiheitstrasse) available for this purpose.

6 tombstones, red sandstone, bordered by a hedge