International trucks have been built and sold by the International Harvester Company (renamed Navistar International in 1986) from 1909 until the present (2023).

Originally marketed to farmers the trucks were immediately successful and were sold to businesses in cities as well. Since then International trucks have been sold worldwide and built or assembled in the United States, Australia, Brazil, Canada, England, Germany, Mexico, South Africa, the Soviet Union, and Turkey.

International Harvester also built large numbers of military tactical vehicles between 1941 and 1961. These were not branded “International”. Navistar has built military tactical trucks since 2007. These are branded “International”. Military trucks are not included here.

In 2019 International markets six separate series of medium-duty, heavy-duty, and severe-service trucks with loaded weights from 16,000 to 92,000 pounds (7,300 to 41,700 kg) and up to 140,000 pounds (64,000 kg) including trailers. International also has always built a wide range of custom and specialty use trucks and chassis.