Jarocin is located about 70 km in the South-East direction from Poznań (Posen). The qahal, here, existed till the 1920s when the majority of the local people turned against the Jews and fierce clashes and riots became a part of their daily lives. This led a huge number of the Jews to move away to some different bigger German towns. At the beginning of the 1930s there were only about 120 people of the Jewish origin left in the city. However, all of them were expelled from Poznań when the occupation in 1939 began. Most of them died in the ghettos or concentration camps in the Eastern areas of Poland.

The best-known member of the qahal in Jarocin is a Prussian lawyer and politician Eduard (properly Jizchak) Lasker. He was born in Jarocin on 14th October 1829 and died in New York on the 5th January 1884 at the age of 54. He was a son of a craftsman Daniel Lasker and his wife Rebeka. He attended a junior high school in Wrocław (Breslau) at the age of 13 and at that time he changed his name to Eduard. After having achieved his High School Diploma in 1847 he began mathematics and philosophy studies at the Wrocław University. He spent the time of the Revolution of 1848-49 in Vienna but he came back to Wrocław where he started studying law because of his fascination with the current political events. After the graduation he went to Great Britain where he spent three years. In 1857 he came back to Germany, where unfortunately as a lawyer with Jewish origins he had no chances of working in his field. Already then, he supported the political ideas of his friend Heinrich Bernhard Oppenheim and in 1865 he bacame an MP in the second round. He was a member of the German Progress Party (Deutsche Fortschrittspartei, DFP) until 1866 and a year later he was one of the founders of the National Liberal Party (Nationalliberale Partei, NLP). Soon, he bacame a leader of the left-liberal wing of this party. However, in 1880 Lasker decided to leave the party and he co-created the Liberal Association, which was a great success in elections mainly in Prussia. Lasker himself, despite his Jewish origin, achieved political successes as well. When he died, Bismarck sent back the letter with condolences from the American Congress as he claimed that Lasker's activity was not beneficial for the German nation. What's more, he forbade his ministers and clerks to take part in the funeral. However, despite all his aversion, Bismarck acknowledged Lasker as an 'honorary opponent'. One of Lasker's greatest achievements surely is the so-called Lex Miguel-Lasker, which is an act widening the legislative powers of the Reich e.g. in the domain of the civil rights. It was a first step in creating a homogeneous Civil Code (Bürgerliches Gesetzbuch, BGB). Eduard Lasker was buried in the Jewish cemetery at Schönhauser Allee in Berlin in 1901.

The qahal in Jarocin had its own synagogue which was built on the place of the former one in the 1940s.