Although most of his works were secular, he did produce some works with a Jewish theme. These include etchings of a Rabbi and of the Turnergasse 22 Synagogue (dated 1902) which is archived in the Austrian National Library. In her book, Synagogues of Europe, Carol H. Krinsky has included an oil painting print of the Vienna Tempelgasse Interior Ark (dated 1904) attributed to Emil Ranzenhofer. Chapter 5 in the third volume of the series German-Jewish History in Modern Times: Integration in Dispute written by Steven Lowenstein includes an image entitled “A meeting of the Jewih community leadership of Vienna chaired by its president, Heinrich Klinger. Watercolor by Emil Ranzenhofer, 1902”.
Emil Ranzenhofer desiged many of the early fund raising certificates used by the Jewish National Fund (JNF). The June 23, 1911 issue of the Die Welt wrote: “The Jewish Artist Emil Ranzenhofer in Vienna, whom we have to thank for the sketches of the Golden Book, the golden Book Certificate, the Olive Tree Certificate and the Telegram, has produced a new piece of artwork under the guidance of our esteemed John Kremenezky, in the form of a Certificate of Land Donation that has already met with much applause and should lead to the popularization of this donation everywhere.”
He designed the “Ranzenhofer Type” Jewish National Fund Greeting Telegram that was used in fundraising. The difference between the cost of sending a telegram and mailing a letter would be the donation to the JNF. The earliest telegram of this type was used in 1908. The extent of Emil Ranzenhofer’s involvement in the Zionist Movement is unclear. However, he did design the official postcard for the Sixth Zionist Congress that was held in Basel, Switzerland in 1903. He also designed a second unofficial postcard that was also used during this same time.