Narok County is situated in the southern part of the Great Rift Valley. Narok lies between latitudes 0° 50´ and 1° 50´ South and longitude 35° 28′ and 36° 25´ East. The county borders the Republic of Tanzania and six other counties – Nakuru, Bomet, Nyamira, Kisii, Migori County and Kajiado.

The Maasai Mara National Reserve and Mau Forest located in the county.

The main cash crop grown in Narok County is wheat.

As of 2018, gold production from mines located in Narok County was 111 kg.

Along with Kisii County, Narok County has been identified as having the highest level of practice of female genital cutting in the country, despite the practice being outlawed in 2001.