Petrosimonia is a genus of flowering plants belonging to the family Amaranthaceae.

It is native to Albania, Bulgaria, Greece, Romania (in southeastern Europe), Central European Russia, Crimea South European Russia and Ukraine, (Eastern Europe), Altay, Irkutsk, Tuva and West Siberia, (in Siberia), North Caucasus, Transcaucasus, (in the Caucasus), Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan and Uzbekistan (in Central Asia) and Afghanistan, Iran, Lebanon, Mongolia, Syria and Turkey, (in Western Asia) and also Xinjiang in China.

[1] The genus name of Petrosimonia is in honour of Peter Simon Pallas (1741–1811), a Prussian zoologist and botanist who worked in Russia (1767–1810).

[2] It was first described and published in Mém.

Saint Pétersbourg, Sér.