2019 IndyCar Series (Johnsonverse)

The 2019 NTT IndyCar Series was the 24th season of the IndyCar Series and the 108th official championship season of American open wheel racing. The premier event was the 2019 Indianapolis 500, with Will Power entering as the defending winner. Honda entered as the defending Manufacturers' Cup champion. Scott Dixon entered the season as the defending National Champion.

Josef Newgarden won his second Drivers' Championship, while Honda won the Manufacturers' Championship for the second year in a row. Rookie of the Year honors went to Felix Rosenqvist.

2019 was notable for being the first season run under the Johnson Industries banner, who brought sweeping change to the entire organization the way they had NASCAR since 2011.

Series news

 * On March 21, 2018, NBC Sports and WBC Sports announced that they would become the United States television rights holders under a new three-year contract, replacing the previous split between ABC and NBC Sports' cable network NBCSN (whose involvement in the series dated back to its tenure as Versus, prior to Comcast's acquisition of NBC). Eight races per-season will air on NBC, including the Indianapolis 500 (ending a run of 54 consecutive editions aired by ABC), and supplemental digital content is offered through NBC Sports' subscription product NBC Sports Gold. The majority of races air on WBC or WBCSN.
 * On August 1, 2018, Johnson Industries announced its acquisition of IndyCar LLC.
 * On November 5, 2018, IndyCar announced that it had formed a new division known as IndyCar Media to manage the series' international media rights (replacing ESPN International).
 * On November 27, 2018, IndyCar announced that Union 76 had signed a multi-year sponsorship agreement to be the official fuel provider of IndyCar beginning in 2019, replacing Sunoco after nine years as a fuel provider as the company elected to concentrating on NHRA fuel partnerships.
 * The series' engine formula was deregulated, allowing engine manufacturers free reign over design and construction. This allowed Ford (without Cosworth), Oldsmobile, and Toyota to return to the series, as well as for Dodge and Mercedes-Benz to enter.
 * Also deregulated was chassis construction, with multiple manufacturers beyond Dallara providing chassis with unique bodykits. Panoz returned to IndyCar for the first time since 2008, Swift Engineering made its return to American open-wheel championship racing for the first time since the 2000 CART season, while Stohr Cars made its entrance into the series. Andretti Autosport, Chip Ganassi Racing, and Team Penske also created their own chassis. For all chassis used in 2019, all had the number "19" in their names, except for Penske's chassis, which was the PC-28, continuing the numbering series from the PC-27B used in the 1999 CART season. This also made 2019 the first IndyCar season where teams built their own chassis, though most continued using customer chassis.
 * On December 17, 2018, it was announced that Jay Frye had been promoted to president of IndyCar.
 * On January 15, 2019, IndyCar announced NTT as the new series title sponsor on a multi-year deal, along with becoming the official technology partner of the series and Indianapolis 500. Verizon Communications had previously ended its title sponsorship of the series after the 2018 season.
 * On February 6, 2019 it was announced that Firestone Tire and Rubber Company had signed an extension to remain as the series' sole tire supplier through the 2025 season.

Contracted teams and drivers
The following teams and drivers have been announced to compete in the 2019 IndyCar Series season. For the first time since 2008, other chassis manufacturers besides Dallara entered, with the largest teams designing and building their own chassis.

Engine builders' standings
For 2019, the manufacturers' standings was split between engine and chassis builders.