Ömnögovi (Mongolian: Өмнөговь Ömnögovǐ, South Gobi) is an aimag (province) of Mongolia, located in the south of the country, in the Gobi Desert. Ömnögovi is Mongolia's largest aimag. The capital is Dalanzadgad.
The province is rich in mineral deposits, including gold and copper. Agriculture is of minor importance. Vegetables are grown in some oases, e.g. in Dal near Dalanzadgad.
As the aimag has various sights to offer, tourism is gaining importance. Ömnögovi includes several well known tourist areas, including the Flaming Cliffs, Gobi Gurvansaikhan National Park and Khongoryn Els - The Singing Sand Dunes.