Baron Ignaz von Plener (21 May 1810 – 17 February 1908) was an Austrian statesman.

Baron (Freiherr) Ignaz von Plener was born in Vienna in 1810 in a family of lower nobility.

He studied law at the University of Vienna before entering the governmental service.

In 1859 he was made Privy Councilor, a year afterward received the portfolio of Finance and revived the Bank Acts and the Ministry of Commerce before his resignation in 1865, and in 1867 entered the Liberal Centralist cabinet of Giska as Minister of Commerce.

In 1882 Plener was an ardent opponent of a personal income tax.