The 2012 NASCAR Nationwide Series was the 31st season of the NASCAR Nationwide Series, the second-tier professional stock car racing series sanctioned by NASCAR in the United States. The season included thirty-three races, down from thirty-four, and began with the DRIVE4COPD 300 at Daytona International Speedway and ended with the Ford EcoBoost 300 at Homestead-Miami Speedway. Chevrolet won the Manufacturer's Championship. Joe Gibbs won the Owners' Championship with the No. 18 car, while Ricky Stenhouse Jr. of Roush Fenway Racing won the Drivers' championship with a sixth-place finish at the final race of the season.
 The Nationwide Series started its 2012 season at Daytona. The race was dominated by a mix of tandem and pack drafting. On the final lap, Kurt and Kyle Busch attempted to block the tandem of Joey Logano and Trevor Bayne. When the Busch brothers moved up to block, it resulted in a 10 car collision that wrecked most of the top 10. Part-time Nationwide driver James Buescher sailed through the wreck and scored his first series win. Heading to Phoenix, Kevin Harvick dominated the race, leading 90 laps. On the final pitstop, teammate Sadler got two tires and managed to hold off a charging Brad Keselowski for his first Nationwide win in 14 years. Heading to Las Vegas, defending champion Ricky Stenhouse Jr. held off veteran Mark Martin for his first win of the season. The next week at Bristol, polesitter Logano dominated the race, leading 119 laps. But Elliott Sadler, on the advice of crew chief Luke Lambert, stayed out during the final round of pit stops and held off Kasey Kahne for his second win in four races. In California, Logano won back-to-back poles, but held off Stenhouse for his first win of the season.
 Following the off week, teams returned to racing at Texas. There, Stenhouse and Paul Menard were the class of the field, with Menard leading 100 laps. However, Stenhouse rallied from a poor early pitstop and held off Menard for his second win of the season. At Richmond, Harvick, Kurt Busch, and Virginia native Denny Hamlin dominated the race, but Busch would hold off Hamlin to take the first Nationwide win for Kyle Busch Motorsports. The following week at Talladega, a multi-car crash on the last lap forced a red flag. On the restart, Joey Logano edged Cup teammate Kyle Busch by 0.034 seconds to take his second win of the year. At Darlington, Hamlin dominated the race, leading 102 laps. However, a push from Keselowski on a green-white-checkered restart sent Logano to the lead and to his second consecutive win. At Iowa, points leader Stenhouse once again dominated, leading 209 of 250 laps to easily claim his third consecutive Iowa win. At Charlotte, Keselowski stayed out during the final round of pit stops, going 73 laps on a single tank of fuel to claim his first win of the season. At Dover, Logano dominated the race and held off teammates Ryan Truex and Brian Scott to grab the win.
 Following the second off weekend, the series returned to action at Michigan, where Logano once again dominated the race, holding off Buescher to grab his second consecutive victory. The following week at Road America, Nelson Piquet Jr. dominated the race from pole, grabbing his first Nationwide win and becoming the first Brazilian to win in one of NASCAR's top three divisions. At Kentucky, Austin Dillon dominated the race, easily holding off the field to take his first career Nationwide win and becoming the first rookie winner since Juan Pablo Montoya. Dillon took over the points lead, but lost it after failing post-race inspection. When the series returned to Daytona, multiple Big Ones took out most of the contenders. However, Kurt Busch stayed out front and pulled a last lap pass on Joey Logano to take his second win of the season. The series headed to Chicago, where Stenhouse dominated most of the day, but a decision to stay out when the leaders pitted on lap 130 cost him later. On lap 166, Stenhouse pitted, handing the lead to points leader Sadler. Sadler managed to hold off both Stenhouse and Illinois native Justin Allgaier on a green-white-checkered to take his third win of the season and win the Nationwide Dash 4 Cash bonus.
 The series made its inaugural trip to the Brickyard, where points leader Sadler led after Kyle Busch was involved in a late wreck. However, NASCAR officials penalized Sadler for allegedly jumping the final restart, sending him back to 16th. Cup regular Keselowski took the lead and held off teammate Sam Hornish Jr. to give owner Roger Penske his first stock car win at Indy. At the second race in Iowa, polesitter Elliott Sadler rebounded from the disappointment at Indy and held off Justin Allgaier to grab his fourth win of the season. Heading up north to Watkins Glen, Keselowski dominated the race, but Carl Edwards, making a one-off appearance, passed Keselowski with 10 to go and held on for his first win of the season. The series headed north of the border for its final road course race at Montreal. Jacques Villeneuve dominated the race, but was forced to conserve fuel over two green-white-checkered finishes. On the second attempt, Justin Allgaier pulled a bump and run on Villeneuve on the final lap to take his first win of the year.
 Action resumed at the newly reconfigured Bristol. Harvick led the race for 98 laps, seeking the No. 33 team's first win of the year. However, he ran out of fuel during a caution on lap 238, handing the lead to Joey Logano. Logano would then hold off Stenhouse for the victory. At Atlanta, Harvick dominated the race, leading 157 laps. However, a late caution for a crash by Mike Bliss, Buescher, and Kyle Fowler bunched up the field. On the ensuing restart, Stenhouse made a last lap pass on Harvick to take the win. The following week at Richmond, Harvick would make up for the losses and dominated the race, leading 141 laps en route to his first win of the season. Returning to Chicagoland, Stenhouse rallied from an incorrect adjustment on the final pit stop to pass Kyle Busch with 20 to go to take his fifth win of the season as well as the points lead. At Kentucky, polesitter Austin Dillon took advantage of a fast final pitstop to get in front of the field, holding off Hornish to sweep the Kentucky races and put himself back in the championship hunt.
 The series returned to Dover, where Logano once again dominated the race, leading 184 of 200 laps en route to his 7th win of the year and the season sweep at the "Monster Mile". Returning to Charlotte, the race was dominated by Cup regulars Keselowski, Logano, and Harvick. The final 30 laps were a fuel mileage race, where Logano, who pitted with 14 to go, retook the lead with 6 to go, rolling to his series high 8th win of the season. At a repaved Kansas, Stenhouse rallied from 2 laps down as well as mid-race contact with Logano to beat Kyle Busch on a green-white-checkered restart to grab his sixth win of the year. At the penultimate race in Phoenix, Logano dominated the race, holding off teammate Brian Vickers on a green-white-checkered finish to score his 9th win of the season while Stenhouse extended his points lead after Sadler crashed late in the race. At the season finale at Homestead, Regan Smith held off a dominant Kyle Busch to score his first Nationwide victory, while Stenhouse finished off his Nationwide Series career with a 6th-place finish and a second consecutive Championship.
 (key) Bold - Pole position awarded by time. Italics - Pole position set by final practice results or rainout. * – Most laps led.