International trucks have been built and sold by the International Harvester Company (renamed Navistar International in 1986) from 1909 until the present (2026). 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 and up to including trailers. International also has always built a wide range of custom and speciality use trucks and chassis.

1909–1919

Auto Wagon (1909-1916)

Models: Auto Wagon AA, AW, MA, MW, MAX, MWX

The Auto Wagon, a variant of the Auto Buggy of 1907, was the first truck built by International Harvester. It was basically a light wooden wagon with a primitive gasoline engine mounted below the body. They were sometimes called "Highwheelers". Introduced in 1909 it was designed for farmers using poor rural roads but soon became popular in urban areas. The Auto Wagon was built until 1916. "Early Vehicles -- 1907-1929", Wisconsin Historical Society (2011)

F Series (1913) Models: H, F, K, G, L

The Model F was a completely different type of truck than the Auto Wagon, with a steel ladder frame. It had a "Renault-type" tapered hood, often referred to as a coffin-nose or shovelnose. A front-mounted engine drove through a transmission and driveshaft to a geared differential rear axle. The models were given letter designations in chronological order, with the weight ratings being for the H, for the F, for the K, for the G, for the L.

1920–1939

Models 21-101 (1921-1924) Sometime in 1921, the old Model F and its derivatives were renamed. The new versions received slightly higher weight ratings, to make room for the new, lighter Model S below. Now names in order from lightest to heaviest, the range started with the Model 21 and continued with the Model 31, Model 41, Model 61, and ended with the Model 101; the Model 101 only entered production during 1922. These remained of a shovelnose design, with the radiator mounted behind the engine, a layout retained until they were replaced by the more conventional Models 33-103 in 1924.

Models 33-104, HS series (1924-1932) The Model F-based medium- and heavy-duty Models 21-101 received an update in 1924, with the radiator mounted in the usual location in front of the engine. They were still old-fashioned, retaining the 1916-vintage frame and option of solid rubber wheels rather than pneumatic ones, but the steering assembly was all-new, eliminating the nearly upright steering wheel seen on the earlier versions and the engines were upgraded. The new range consisted of the Model 33 Model 43, Model 63, Model 94 (introduced in late 1924), and ended with the Model 103.

In late 1926, for the 1927 model year, the chassis was updated with a new rear axle and the range renamed to Models 54, 74, and 104. Introduction was gradual and there was some overlap, and only the heavier-duty models remained, weight ratings being , , and respectively. Solid tires, cast iron wheels, and chain drive remained available. During 1928, International's own tractor engines were replaced in the heavy-duty lineup by much more modern and powerful units from Hall-Scott; model numbers accordingly gained an HS- prefix and these were fitted with front drum brakes to handle the higher speeds possible. In 1930, the HS series was gradually replaced by two new lines: from below, the smaller A series took over, fitted with in-house engines, with heavier models being replaced by the W series which was an updated HS. The chain driven HS-74-C and 104-C were not replaced and continued to be built in small numbers until 1932, being favored by some loggers and contractors for its simplicity and strength.

W series (1930-193x) Gradually introduced beginning in 1930, the W series was a revised version of the 54, 74, and 104, still using the Hall-Scott engines. More modern in appearance, they have a chrome-plateed grille, a center-hinged hood, and headlights mounted in the conventional locations aside the grille. Chain drive was no longer available. The more modern A series gradually replaced the W series and the lineup shrunk as the W-1 was discontinued in 1933, and the W-3 in 1934. The W-2 remained available into 1935 as an especially heavy-duty option.

C series (1934-1936) The C series was a range of trucks introduced in 1934. They introduced a new all-steel cab. There were also mechanical advances during its production. All types of bodies were used, door-to-door milk delivery models were common. Cab-over-engine models were available. The C-series was replaced by the D Series in 1937. "Model C", Wisconsin Historical Society (2011)

D Series (1937-1939) The D Series was a range of light, medium, and heavy-duty trucks introduced in 1937. They had rounded styling and a new cab with a two-piece V-shaped windshield. Cab-over-engine models were also available. All types of bodies including semi-tractors were available. The D Series was replaced by the K Series in 1940. "Model D", Wisconsin Historical Society (2011)

Metro (1938-1962)

Models: D, K/KB, L, R, S, and A to -ton (450–1360 kg) chassis with an "M" in model number

The Metro was a range of step vans introduced in 1938. It had a rounded cab-over-engine body with sliding doors on a then-current light or medium chassis. Bodies were built at the Metropolitan Body Co. and cab-chassis were offered for vendor bodies. In 1963 the original-style bodies were replaced with flat-panel models. In 1972 Metropolitan Body closed. "Metro", Wisconsin Historical Society (2011)

1940–1959

K and KB series (1941-1949)

The K series was a complete range of trucks introduced in December 1940. It was an update of the D series of 1937 with cosmetic changes. In 1947 the K was updated as the KB. All types of bodies were used including semi-tractors. COE models were offered until 1943. The KB was replaced by the L series in 1950. "K Line", Wisconsin Historical Society (2011) "KB Line", Wisconsin Historical Society (2011)

L series (1949–1951)

The L series was a complete range of trucks introduced in late 1949. The first new trucks since the war-era D/K/KB models, they introduced a cab with a one-piece curved windshield that continued in service until 1971. They were also the first trucks with the Raymond Loewy "IH" insignia that was used into the 1970s. All types of bodies were used, models above the 170 were available as semi-tractors. Cab-over-engine models were available from 1950. The L-series was replaced by the R Series in 1952. "L Line", Wisconsin Historical Society (2011)

R series (1953-1967)

The R series was a complete range of trucks introduced in 1953. It was an update of the L series, with the same cab, cosmetic changes to the front end, and more engines available. Cab-over-engine models were available. All types of bodies were used, models R-190 and above were available as semi-tractors. In 1955 the light and medium-sized models were replaced with the S Series. The heavy-duty versions were replaced by the FleetStar A in 1968. "R Line", Wisconsin Historical Society (2011)

V series (1953-1967) The V series a range of heavy-duty high-power trucks introduced in 1953. It used the same cab as the R series, but had a shorter hood with a large rectangular grill opening. The series was developed for a new large V8 type engine. Cab-over-engine models were available. They were replaced in by the FleetStar in 1968. "V Line", Wisconsin Historical Society (2011)

A and B series (1957-1964)

The A series was a line of light and medium trucks introduced in 1957. A special A-100 Golden Jubilee Model had a gold and white paint scheme. It had modern styling and introduced a new, wider cab that would be used until 1976. A 1959 update changed the name to B series. A variant, the AC/BC, a modified conventional with a shorter hood, led directly to the LoadStar, which replaced them in 1962. Light duty B Series models were replaced by the C Series in 1965. "A Line", Wisconsin Historical Society (2011) "B Line", Wisconsin Historical Society (2011)

1960–1969

Scout / Scout II (1961-1979)

The Scout was a small utility vehicle introduced in 1961. It was an open two-door with a flat panel body. It could have removable pickup or full-length roofs, in both folding and hard types. The Scout was designed to be a utility truck with four-wheel drive, but most were sold as personal recreational vehicles with full-length roofs. The Scout and updated Scout II continued in production largely unchanged until discontinued in 1980. "Scout", Wisconsin Historical Society (2011)

Loadstar (1962-1976)

The Loadstar was a medium-duty short-hood conventional introduced in 1962. Cab-over-engine models were also available until replaced by the Cargostar in 1971. The Loadstar was used for local delivery, construction, farming, and as a semi-tractor. The Loadstar was replaced by the S Series in 1977. "Loadstar", Wisconsin Historical Society (2011)

FleetStar (1963-1976)

The FleetStar was a heavy-duty short-hood conventional. It was introduced in 1962 and entered production in 1963. The cab, grey grill, and "butterfly" hood were the same as used on the LoadStar. In 1969 a one-piece tilting hood became standard. The FleetStar was used as both a local straight truck with mid-range engines and as a semi-tractor with heavy-duty engines. The FleetStar was replaced by the S-Series in 1977. "Fleetstar", Wisconsin Historical Society (2011)

TranStar / TranStar II CO4070 (1968-1983)

The TranStar cab-over-engine models were heavy-duty over-the-road semi-tractors introduced in 1968. Daycab models were available but most had a sleeper compartment. In 1974 the improved raised cab CO4070B TranStar II was introduced and the low-cab version was discontinued. The TranStar II was replaced by the CO9670 in 1984. "Transtar", Wisconsin Historical Society (2011)

D series (1969-1975)

The D-Series was a light duty conventional introduced in 1969. It had an entirely new body with a simple flat panel design similar to the smaller Scout. They were used as pickup trucks and chassis-cabs for dump, platform, and specialty bodies. The Travelall station wagon and Travelette crew-cab pickup were also offered. The D-Series was International's last light truck and was discontinued in 1975.

1970-1979

CargoStar (1970–1986) The CargoStar was a forward control cab-over-engine medium-duty series introduced in 1970. Replacing the cab-over-engine LoadStar models, the CargoStar had an improved cab and heavier models. The CargoStar's maneuverability made it useful in cities as straight trucks, larger models could be local semi-tractors. The CargoStar was discontinued in 1986. "Cargostar", Wisconsin Historical Society (2011)

TranStar 4200/4300 (1971–1984)

The TranStar was a heavy-duty long hood conventional introduced in 1971. It had a new cab that would also be used by the new PayStar. A large forward tilting rectangular hood had a very large grille area. The TranStar was used as a semi-tractor for local construction, regional hauling, and long distance over-the-road trucking. In 1985 the TranStar was renamed the 9370.

PayStar 5000 (1972–1998)