Riyom is a Local Government Area in Plateau State, Nigeria. It was carved out of the old Barkin Ladi Local Government Area on 1 October 1996 by the Federal Military Government of General Sani Abacha. It is headquartered in the town of Riyom to the north of the area at .
It has an area of and a population of 131,557 at the 2006 census, which is predominantly Berom. The LGA has boundaries with Kaduna and Nasarawa State. Riyom is the birthplace of all Berom peoples.
It is the gateway to the State when coming from the East and from Abuja. Riyom is also the site of the famous Riyom rocks formation that is featured in many things Plateau and has become a trademark of the state.
The postal code of the area is 931.
Riyom Local Government Area (LGA) shares boundaries with Bassa LGA to the north, Jos South LGA to the northeast, and Barkin Ladi LGA to the east; and Kauru LGA to the northeast, Kaura and Jema'a LGAs to the west, and Sanga LGA to the southwest of southern Kaduna State.
At an average temperature of 28 degrees Celsius, Riyom LGA covers an area of 807 square kilometers. The average humidity level in the LGA is 49%, and the area is characterized by hills and rocks.
The warm, muggy, and cloudy rainy season and the hot, partly cloudy dry season are observed in Riyom Local Government Area. It rarely drops below 50ðF or rises over 96ðF throughout the year, usually fluctuating between 55ðF and 91ðF.
The average daily maximum temperature during the 2.8-month hot season, which runs from January 29 to April 21, is above 88ðF. March is the hottest month in Riyom, with an average high temperature of 91ðF and low temperature of 64ðF. The average daily high temperature during the 3.1-month cool season, which runs from July 1 to October 4, is below 78ðF. With an average low of 62ðF and high of 75ðF, August is the coolest month of the year in Riyom.
Riyom Local Government Area consists of 12 districts.
Languages spoken in Riyom LGA include: Berom, Aten and Takad.
There are over 50 public primary schools in the Local Government Area.