Grigory Spiridonovich Petrov (Russian: Григо́рий Спиридо́нович Петро́в; 6 February 1866 – 1925) was a priest, public figure, and publicist.

From 1895 through to 1906, he served as a prior of the Church of Mikhaylovsky Ordnance Academy; while in 1902–1904 he also worked as a lecturer of theology at the Polytechnical Institute.

In 1907, he was elected Deputy of the Second State Duma as a member of the Constitutional Democratic Party.

The same year following his critical letter addressed to Metropolitan Anthony he was banned from his ministry and sent for discipline to the Cheremenetsky Monastery.

Petrov welcomed the February Revolution of 1917, although his attitude towards the Bolshevik overturn was negative.