Circus Renz was a German circus company. It was established in 1842 in Berlin by Ernst Jakob Renz (1815–1892) as Circus Olympic and existed until 1897. The company had several stationary buildings in Berlin, Hamburg, Bremen, Breslau and Vienna.
Today several circus companies in Germany make use of the family name Renz. Among them, Circus Universal Renz and Zirkus Renz Manege are the biggest. Apart from them, there are other circusses of the name Renz out of Germany, e.g. Dutch Circus Renz International, Circus Renz Berlin and Circus Herman Renz, who are often falsely assumed to be linked to the famous dynasty.