Graymont is an unincorporated community in Livingston County, Illinois, United States. Graymont is 7 miles west of Pontiac. Graymont has a post office with ZIP code 61743. Farmers Elevator Company of Graymont, now known as the Graymont co-op association, was founded 1904. The original structures no longer exist, but the company is still operation and has …Graymont is an unincorporated community in Livingston County, Illinois, United States. Graymont is 7 miles west of Pontiac. Graymont has a post office with ZIP code 61743. Farmers Elevator Company of Graymont, now known as the Graymont co-op association, was founded 1904. The original structures no longer exist, but the company is still operation and has expanded to become one of the largest in Livingston County, IL. The State Bank of Graymont began operations in 1913.