Oscar Minor Crutchfield (16 January 1800 – 15 May 1861) was a Virginia politician. He represented Spotsylvania County in the Virginia House of Delegates and served as that body's Speaker from 1852 until 1861. He presided over the House during the special session that on 19 January 1861 approved the calling of a state convention to consider Virginia's response to the secession crisis.
Crutchfield also served as Grand Master of the Grand Lodge of Virginia from 14 December 1841 through 12 December 1843.
He is buried on his Spotsylvania County estate.