Arkhangai Province () is one of the 21 provinces of Mongolia, located slightly west of the country's center, on the northern slopes of the Khangai Mountains. It is composed of 19 districts.
The province was founded in 1931.
Arkhangai province has 19 sums and 101 bags. The aimag capital Tsetserleg is geographically located in the Erdenebulgan sum in the south of the aimag. It is not to be confused with the Tsetserleg sum in the north.
<sup>*</sup> - The aimag capital Tsetserleg
In winter, the mean temperature is , and in summer, the highest temperature is between .
The province has a total forest area of 10,086 km<sup>2</sup>, which represents 18.6% of the province's area.
The main field of economy in the aimag is agriculture, predominantly animal husbandry. According to 2004 data, the aimag was home to 1,948,000 domestic animals: goats, sheep, cattle (incl. yaks and khainags), horses and camels. Camels are almost exclusively herded in the southeastern sums.
In 2018, the province contributed to 1.34% of the total national GDP of Mongolia.