Otto von Helldorff (16 April 1833 in Bedra, Saxony – 10 March 1908 in Bedra, Saxony) was a German politician for German Conservative Party.

His father was landowner and politician Heinrich von Helldorff [de] (1799–1873) and Julie Charlotte Gräfin von der Schulenburg (1806–1844).

He owned castle Bedra in Saxony and land in Leiha, Schalkendorf and Petzkendorf.

From 1890, Helldorff was a member of the Prussian House of Lords.

[2] On 7 July 1867 he married in Hamburg Clara Stammann (1846-1918).