The 2018 Rinnai 250 was the 2nd stock car race of the 2018 NASCAR Xfinity Series season, and the 27th iteration of the event. The race was held on Saturday, February 24, 2018 in Hampton, Georgia at Atlanta Motor Speedway, a 1.54 miles permanent asphalt quad-oval intermediate speedway. The race took the scheduled 163 laps to complete. At race's end, Kevin Harvick driving for Stewart-Haas Racing with Biagi-DenBeste would dominate the race and win his 1st and only win of the season driving a part-time schedule. The win was the 47th, and so far as of 2021, final win of his NASCAR Xfinity Series career. To fill out the podium, Joey Logano of Team Penske and Christopher Bell of Joe Gibbs Racing would finish second and third, respectively.
The 2018 My Bariatric Solutions 300 was the 6th stock car race of the 2018 NASCAR Xfinity Series season, and the 22nd iteration of the event. The race was held on Saturday, April 7, 2018 in Fort Worth, Texas, at Texas Motor Speedway, a 1.5 miles permanent tri-oval shaped racetrack. The race took the scheduled 200 laps to complete. At race's end, Ryan Blaney of Team Penske would dominate and win his 7th and so far final career NASCAR Xfinity Series win, and his first and only of his part-time season. To fill out the podium, Christopher Bell of Joe Gibbs Racing and Daniel Hemric of Richard Childress Racing would finish second and third, respectively.
The 2018 DC Solar 200 was the fourth stock car race of the 2018 NASCAR Xfinity Series season and the 14th iteration of the event. The race was held on Saturday, March 10, 2018 in Avondale, Arizona, at ISM Raceway, a 1 mile permanent low-banked tri-oval race track. The race took the scheduled 200 laps to complete. At race's end, Brad Keselowski of Team Penske would take control after the final pit stops to overcome a penalty and win his 37th career NASCAR Xfinity Series season and his first of his part-time season. To fill out the podium, Justin Allgaier of JR Motorsports and Kyle Busch of Joe Gibbs Racing would finish second and third, respectively.
The 2018 DC Solar 300 was the 26th stock car race of the 2018 NASCAR Xfinity Series season, the final race of the regular season, and the inaugural iteration of the event. The race was held on Saturday, September 15, 2018, in North Las Vegas, Nevada at Las Vegas Motor Speedway, a 1.5 miles permanent D-shaped oval racetrack. The race took the scheduled 200 laps to complete. At race's end, Ross Chastain of Chip Ganassi Racing would dominate, redeeming himself from the 2018 Sport Clips Haircuts VFW 200 to win his first ever NASCAR Xfinity Series career win and his first and only win of the season. To fill out the podium, Justin Allgaier of JR Motorsports and Cole Custer of Stewart-Haas Racing with Biagi-DenBeste would finish second and third, respectively.
The 2018 Drive for the Cure 200 presented by Blue Cross Blue Shield of North Carolina was the 28th stock car race of the 2018 NASCAR Xfinity Series season, the second race in the Round of 12, and the 37th iteration of the event. The race was held on Saturday, September 29, 2018, in Concord, North Carolina at the Charlotte Motor Speedway roval, a permanent 2.28 miles road course, using part of the oval and part of the infield road course. The race took the scheduled 55 laps to complete. At race's end, Chase Briscoe of Stewart-Haas Racing with Biagi-DenBeste would dominate the late stages of the race to win his first ever career NASCAR Xfinity Series win and his first and only win of the season. To fill out the podium, Justin Marks of Chip Ganassi Racing and Austin Cindric of Team Penske would finish second and third, respectively.
The 2018 Zippo 200 at The Glen was the 20th stock car race of the 2018 NASCAR Xfinity Series season, and the 24th iteration of the event. The race was held on Saturday, August 4, 2018, in Watkins Glen, New York at Watkins Glen International, a 2.45-mile permanent road course. The race took the scheduled 82 laps to complete. At race's end, Joey Logano of Team Penske would dominate the race to win his 30th career NASCAR Xfinity Series win and his second and final win of the season. To fill out the podium, A. J. Allmendinger of GMS Racing and Justin Allgaier of JR Motorsports would finish second and third, respectively.
The 2018 Pocono Green 250 Recycled by J. P. Mascaro & Sons was the 12th stock car race of the 2018 NASCAR Xfinity Series season and the third iteration of the event. The race was held on Saturday, June 2, 2018 in Long Pond, Pennsylvania, at Pocono Raceway, a 2.5 miles triangular permanent course. The race took the scheduled 100 laps to complete. At race's end, Kyle Busch of Joe Gibbs Racing would dominate and win his 92nd career NASCAR Xfinity Series win and his first of the season. To fill out the podium, Chase Elliott of GMS Racing and Daniel Hemric of Richard Childress Racing would finish second and third, respectively.
The 2018 LTi Printing 250 was the 13th stock car race of the 2018 NASCAR Xfinity Series season, and the 27th iteration of the event. The race was held on Saturday, June 9, 2018, in Brooklyn, Michigan at Michigan International Speedway, a two-mile permanent moderate-banked D-shaped speedway. The race was shortened from 125 laps to 91 due to rain stopping the race. At race's end, Austin Dillon of Richard Childress Racing would win a rain-shortened race after battling with fellow teammate Daniel Hemric in a one-lap shootout during a restart. The win was Dillon's ninth and so far final career win in the NASCAR Xfinity Series and his first and only of the season. To fill out the podium, Cole Custer of Stewart-Haas Racing with Biagi-DenBeste would finish third.
The 2018 Alsco 300 was the 11th stock car race of the 2018 NASCAR Xfinity Series season and the 37th iteration of the event. The race was held on Saturday, May 26, 2018, in Concord, North Carolina at Charlotte Motor Speedway, a 1.5 miles permanent quad-oval. The race was extended from 200 laps to 204 due to a NASCAR overtime finish. At race's end, Brad Keselowski of Team Penske would win the race under caution, as Tyler Reddick and Ty Majeski would both wreck on the backstretch on the final lap, putting out a caution. The win was Keselowski's 38th career NASCAR Xfinity Series win and his second of the season. To fill out the podium, Cole Custer of Stewart-Haas Racing with Biagi-DenBeste and Christopher Bell of Joe Gibbs Racing would finish second and third, respectively.
The 2018 OneMain Financial 200 was the 10th stock car race of the 2018 NASCAR Xfinity Series season and the 37th iteration of the event. The race was held on Saturday, May 5, 2018, in Dover, Delaware at Dover International Speedway, a 1 mile oval-shaped permanent racetrack. The race took the scheduled 200 laps to complete. At race's end, Justin Allgaier of JR Motorsports would hold off his teammate Elliott Sadler in the closing laps to win his sixth career NASCAR Xfinity Series win and his first of the season. Allgaier would also win an extra $100,000 for winning a Dash 4 Cash event. To fill out the podium, Daniel Hemric of Richard Childress Racing would finish third.
The 2018 Sparks Energy 300 was the ninth stock car race of the 2018 NASCAR Xfinity Series season, and the 27nd iteration of the event. The race was held on Saturday, April 28, 2018, in Lincoln, Alabama at Talladega Superspeedway, a 2.66 miles permanent triangle-shaped superspeedway. The race was extended from the scheduled 113 laps to 115 due to a NASCAR overtime finish. At race's end, Spencer Gallagher of GMS Racing would make a last lap pass on Tyler Reddick and fend off the field to win a shocker, winning his first and so far final NASCAR Xfinity Series win of his career and his first and only win of the season. To fill out the podium, Brandon Jones of Joe Gibbs Racing and Justin Allgaier of JR Motorsports would finish second and third, respectively.
The 2018 ToyotaCare 250 was the eighth stock car race of the 2018 NASCAR Xfinity Series season and the 31st iteration of the event. The race was held on Friday, April 20, 2018, in Richmond, Virginia at Richmond Raceway, a 0.75 miles D-shaped oval. The race took the scheduled 250 laps to complete. At race's end, Christopher Bell of Joe Gibbs Racing would dominate the late stages of the race to win his second career NASCAR Xfinity Series win and his first of the season. To fill out the podium, Noah Gragson of Joe Gibbs Racing and Elliott Sadler of JR Motorsports would finish second and third, respectively.
The 2018 Food City 300 was the 22nd stock car race of the 2018 NASCAR Xfinity Series season, and the 37th iteration of the event. The race was held on Friday, August 17, 2018, in Bristol, Tennessee at Bristol Motor Speedway, a 0.533 miles permanent oval-shaped racetrack. The race was extended from its scheduled 300 laps to 310 laps due to a NASCAR overtime finish. At race's end, Kyle Larson of Chip Ganassi Racing would be able to told off Joe Gibbs Racing driver Christopher Bell and JR Motorsports driver Justin Allgaier on the overtime restart to win his 12th and to date, final career NASCAR Xfinity Series win and his fourth and final win of his part-time season. Bell and Allgaier would fill the podium, finishing second and third, respectively.
The 2018 Lakes Region 200 was the 18th stock car race of the 2018 NASCAR Xfinity Series season, and the 29th iteration of the event. The race was held on Saturday, July 21, 2018, in Loudon, New Hampshire, at New Hampshire Motor Speedway a 1.058 miles permanent, oval-shaped, low-banked racetrack. The race took the scheduled 200 laps to complete. At race's end, Christopher Bell of Joe Gibbs Racing would pit for four tires on the final round of pit stops compared to second-place finisher's Team Penske driver Brad Keselowski, who only took two tires. The strategy for Bell proved to be a winning strategy for Bell, as he would hold off Keselowski for the win to win his fourth career NASCAR Xfinity Series win, his third of the season, and his second consecutive win in the series. To fill out the podium, Ryan Preece of Joe Gibbs Racing would finish third.
The 2018 Alsco 300 was the 17th stock car race of the 2018 NASCAR Xfinity Series season and the 18th iteration of the event. The race was held on Friday, July 13, 2018, in Sparta, Kentucky, at Kentucky Speedway, a 1.5-mile tri-oval speedway. The race took the scheduled 200 laps to complete. At race's end, Christopher Bell of Joe Gibbs Racing would comeback from a spin early in the race to win his third career NASCAR Xfinity Series win and his second of the season. To fill out the podium, Daniel Hemric of Richard Childress Racing and Kyle Busch of Joe Gibbs Racing would finish second and third, respectively.
The 2018 Bar Harbor 200 was the 29th stock car race of the 2018 NASCAR Xfinity Series season, the third and final race in the Round of 12, and the 19th iteration of the event. The race was held on Saturday, October 6, in Dover, Delaware at Dover International Speedway, a 1 mile (1.6 km) permanent oval-shaped racetrack. The race took the scheduled 200 laps to complete. At race's end, Christopher Bell of Joe Gibbs Racing would dominate the race to win his seventh career NASCAR Xfinity Series win and his sixth of the season. To fill out the podium, Cole Custer of Stewart-Haas Racing with Biagi-DenBeste and Justin Allgaier of JR Motorsports would finish second and third, respectively.
The 2018 Overton's 300 was the 15th stock car race of the 2018 NASCAR Xfinity Series season and the 18th iteration of the event. The race was held on Saturday, June 30, 2018, in Joliet, Illinois at Chicagoland Speedway, a 1.5 miles (2.4 km) permanent D-shaped oval. The race took the scheduled 200 laps to complete. At race's end, Kyle Larson of Chip Ganassi Racing would come back from the rear of the field to win his tenth career NASCAR Xfinity Series win and his second of his part-time season. To fill out the podium, Kevin Harvick and Cole Custer of Stewart-Haas Racing with Biagi-DenBeste would finish second and third, respectively.
The 2018 Iowa 250 presented by Enogen was the 14th stock car race of the 2018 NASCAR Xfinity Series season and the 8th iteration of the event. The race was held on Sunday, June 17, 2018, in Newton, Iowa at Iowa Speedway, a 7⁄8 mile permanent D-shaped oval racetrack. The race took the scheduled 250 laps to complete. At race's end, JR Motorsports driver Justin Allgaier would dominate the race to win his seventh career NASCAR Xfinity Series win and his second of the season. To fill out the podium, Christopher Bell of Joe Gibbs Racing and Daniel Hemric of Richard Childress Racing would finish second and third, respectively.
The 2018 O'Reilly Auto Parts Challenge was the 31st stock car race of the 2018 NASCAR Xfinity Series season, the second race in the Round of 12, and the 18th iteration of the event. The race was held on Saturday, November 3, 2018, in Fort Worth, Texas at Texas Motor Speedway, a 1.5 miles permanent tri-oval shaped racetrack. The race took the scheduled 200 laps to complete. A wild finish would see Cole Custer of Stewart-Haas Racing with Biagi-DenBeste best JR Motorsports driver Tyler Reddick with a last-lap pass on the backstretch to win his second career NASCAR Xfinity Series race, his first and only win of the season, and a guaranteed spot in the Championship 4. To fill out the podium, Austin Cindric of Team Penske would finish third.
The 2018 EcoBoost 300 was the 33rd and final stock car race of the 2018 NASCAR Xfinity Series season, the championship race of that year, and the 24th iteration of the event. The race was held on Saturday, November 17, 2018, in Homestead, Florida at Homestead–Miami Speedway, a 1.5 miles (2.4 km) permanent oval-shaped racetrack. The race took the scheduled 200 laps to complete. At race's end, JR Motorsports driver Tyler Reddick would take the lead after cunning pit strategy late in the race to win his first career NASCAR Xfinity Series championship, his 3rd win of his career in the series, and his second and final win of the season.
