Adolf Ignjo Waldinger (16 June 1843 – 7 December 1904) was a painter from Osijek, Croatia of Danube Swabian origin.

He was a member of Osijek's Bürgerliche Zeichenschule drawing school.

He was taught by the artists Hugo Conrad von Hötzendorf and Antun Müntzberger.

On completing his studies, he worked in the studios of J. Nowopatzki, Gottfried Seelos and Joseph Sellény.

In Osijek there are two institutions which are named after him: the Art Gallery and Hotel Waldinger which was opened in 1904, the year he died.