|Location||Hamilton Township, Mercer County, near Trenton, New Jersey|
|Owner||New Jersey State Fairgrounds|
|Former names||Trenton International Speedway|
|Major events||AAA/USAC/CART Championship Car Trenton 100/150/200/300 (1949, 1957–79)
NASCAR Grand National/Winston Cup Northern 300 (1958–59, 1967–72)
|Half-mile oval (1900–1941)|
|Length||0.5 mi (.81 km)|
|Mile oval (1946–1969)|
|Length||1 mi (1.6 km)|
|Dog-leg oval "Kidney Bean" (1969–1980)|
|Length||1.5 mi (2.41 km)|
|Banking||Turns 1 & 2: 10°
Turns 3 & 4: 15°
Trenton Speedway was a racing facility located near Trenton, New Jersey at the New Jersey State Fairgrounds. Races for the United States' premier open-wheel and full-bodied racing series of the times were held at Trenton Speedway.
Racing history 
The first race at the Fairgrounds was held on September 24, 1900, but there was no further racing there until 1907. Regular racing began in 1912 and continued until 1941. A new 1 mile dirt oval was opened in 1946. In 1957 the track was paved. It operated in that configuration until 1968 when the track was expanded to 1.5 miles (2.41 km) and a "kidney bean" shape with a 20° right-hand dogleg on the back stretch and a wider turn 3 & 4 complex than turns 1 & 2. The track closed in 1980 and the Fairgrounds itself closed 3 years later. The former site of the speedway is now occupied by the Grounds for Sculpture, a UPS shipping facility, and the housing development known as "Hamilton Lakes".
Champ Car at Trenton Speedway 
Trenton was a long-time stop for the AAA and USAC Championship Car series. Its first recognized Champ Car race was held in 1949 on the dirt mile. The series didn't return until 1957 when the track was paved, but when it did, at least one Champ Car race was held every year until 1979. The final Champ Car races held in 1979 at the track were sanctioned by CART. During his career A. J. Foyt won twelve Indy Car races at Trenton Speedway.
NASCAR at Trenton Speedway 
Trenton hosted the NASCAR Grand National and Winston Cup series 8 times: once each May in 1958 and 1959, and once each July from 1967 to 1972, a race known as the Northern 300. Richard Petty led all drivers with three Trenton Grand National victories. In July 1973 the Northern 300 ran time trials but rain washed out the race and it was never rescheduled. The Northern 300 was placed on NASCAR's 1974 Winston Cup Grand National schedule (Stock Car Racing magazine listed it on the schedule in its early 1974 season issues) but was dropped early in the year and replaced by Pocono Raceway's Purolator 500.
The May 1976 race was Janet Guthrie's first IndyCar appearance.
Major races for NASCAR Modifieds 
Race of Champions 
Other National Championship races for NASCAR Modifieds 
From 1958 to 1971, a NASCAR National Championship race for Sportsman-Modified Stock Cars was held annually at Trenton Speedway, promoted by Sam Nunis. Through 1962, these were hundred-lap races. In 1963, the race was expanded to 200 laps, making it one of the longest and highest-paying races for Modified and Sportsman racers in the country. Ray Hendrick from Virginia was the leading winner of these races, driving the Jack Tant-owned number 11.
State Fair "Triple Headers" 
During the mid 1960s, at the time of the State Fair in September, the speedway hosted a special "Triple Header" event. A 50 lap modified-sportsman race and two 25 lap races, one for URC Sprint Cars and one for ARDC Midgets was staged. These were some of the most exciting races for local drivers to compete on the 1 mile asphalt track. The likes of the colorful drivers of the era were named "Jiggs" Peters, "Gig" Stephens, "Wiggles" Johnson and "Pee Wee" Griffin.
A 100 mile Super-Modified race was also held in 1968 and many racers from the Oswego Speedway competed. Steve Krisiloff, aged 21 (later to become an Indy Car driver) won the race to the surprise of many.
Race results 
All winning drivers were American.
AAA/USAC/CART Championship Car 
NASCAR Grand National/Winston Cup 
|1958||May 30||Fireball Roberts||Chevrolet|
|1959||May 17||Tom Pistone||Ford|
|1967||July 9||Richard Petty||Plymouth|
|1968||July 14||Lee Roy Yarbrough||Ford|
|1969||July 13||David Pearson||Ford|
|1970||July 12||Richard Petty||Plymouth|
|1971||July 18||Richard Petty||Plymouth|
|1972||July 16||Bobby Allison||Chevrolet|
- Galpin, Darren. "Trenton Track Info". Tracks Around the World. The GEL Motorsport Information Page. Retrieved 8 August 2010.
- "Race Results at Trenton Speedway". Racing-Reference.info. Retrieved 9 May 2007.
- Jendras, Jr., Larry. "Trenton Speedway Sportsman-Modified Results". The Vintage Racer. Retrieved 9 May 2007.