Unaizah is in the south of Al-Qassim Province and at the heart of the historical region of Najd. It is located roughly 30 kilometers from Buraydah (the capital of the province) and more than 300 kilometers north of the Saudi capital, Riyadh. Unaizah lies in the northern-central region of the Najd and to the south of the Wadi Al Rumma (Rumma Valley), which is the longest valley on theArabian peninsula. It is surrounded by sand dunes to its north and west, which are known locally as the Al-Ghamis Sands. The Al-Ghadha Woods are located to the north of the city. Next to Unaizah is the Al-Aushaziyah salt lake (or Sabkha), which is considered an official part of the city
