Sting Ray Robb (born September 3, 2001) is an American racing driver. He competes in the IndyCar Series, driving the No. 77 Dallara-Chevrolet for Juncos Hollinger Racing.

Robb received a go-kart at age five, kickstarting his racing career. He started running nationally at age eight, entering Cadet division events from 2010 to 2013. During his first season in the Junior ranks, he finished second in America and raced in Valencia, Spain. Robb won a national championship in Rotax Junior Max karting in 2015. He also raced go-karts in Portugal. In 2015, Robb achieved second place in the Karts to Car Scholarship Shootout, earning a US$15,000 scholarship to race in the Skip Barber Race Series.

Robb switched from go-kart racing to car racing in 2015. He raced in the Skip Barber Winter Series during that year's winter and finished second in the standings. After winning a race in the Formula Car Challenge, where he drove part-time for World Speed Motorsports, he joined the team ahead of the 2017 Pro Mazda Championship. Robb, the youngest driver on the grid, started the year with fourth place in race 2 at St. Petersburg. Further fourth places followed at Road America and Watkins Glen, as well as fifth at Mid-Ohio. Robb finished sixth in the points standings. He remained in Pro Mazda the following season, this time driving for Team Pelfrey. Thanks to a last-lap pass on teammate Andrés Gutiérrez, Robb finished a season-best at Indianapolis. Despite three further top fives, Robb dropped to seventh in the championship.

In 2019, Robb joined Juncos Racing as a part of their Indy Pro 2000 roster. He finished third at the season opener in St. Petersburg. Though a lockup cost him a podium in the first Indy race, Robb bounced back with a second place in race 2 after holding off Danial Frost. He then battled well against Kyle Kirkwood on the Lucas Oil Raceway oval to finish second in the next race. Robb suffered a mechanical issue in race 2 at Road America, before crashing out from a battle for second in Toronto. In the next round at Mid-Ohio, Robb returned to the podium in race 2. He scored his maiden pole at Portland, but was punted into a spin by Artem Petrov at the start. In race 2 of the weekend, Robb finished second. Robb then took pole and led the most laps at Laguna Seca, before experiencing strong tyre wear in the closing laps. An off at turn 5 allowed Kirkwood to pass him, and Robb had to settle for second place again. In the overall standings, Robb finished fourth.

For the 2020 Indy Pro season, Robb returned to Juncos. He started by finishing second at Road America and third in race 2 at Mid-Ohio. He concluded the latter weekend by winning his maiden Indy Pro 2000 race, inheriting the lead and holding off Hunter McElrea in the closing laps. Following the two oval rounds, Robb swept a three-race weekend at Indianapolis. Robb held off Parker Thompson in race 2 of the second Mid-Ohio round to claim another victory. Having stood on all three spots of the podium during the New Jersey event, including a win from pole in race 2, Robb secured the Indy Pro 2000 championship with two races to spare. With a victory in the final round at St. Petersburg, Robb's season tally included seven victories, five pole positions and eleven podiums.

Robb remained with Juncos in 2021 as he used his scholarship from winning the Indy Pro title to move up into Indy Lights. Robb finished eighth in the points standings, with only one top five at Mid-Ohio to his name.

On October 28, 2021, Andretti Autosport announced that Robb would join the team full-time for the 2022 Indy Lights season. In the second round of the season at Barber, Robb scored his first podium in the series with third. He inherited another third place in race 1 at Indy thanks to an incident ahead, then went from 13th on the grid to third in race 2, passing a battling group of cars in the closing laps. Robb attempted to pass Benjamin Pedersen for second place in the opening Detroit race but slid into the wall, causing him to finish eleventh. He returned to the podium with third on Sunday. At Road America, Robb qualified on pole and finished second, having been overtaken by Christian Rasmussen during the lap 11 restart. A sixth at Mid-Ohio and fifth in Iowa were followed by another second-place finish on the streets of Nashville. Next followed two quieter rounds with a pair of sixth places. In the Laguna Seca season finale, Robb dominated race 1 from pole, building an 11-second gap to achieve his first and only Indy Lights win. He narrowly missed out on victory in race 2 to Rasmussen, finishing second in both the race and overall points table.

Robb made his IndyCar Series testing debut in July 2022, driving the No. 98 Andretti alongside Christian Rasmussen.