2018 IndyCar Series

The 2018 Verizon IndyCar Series was the 23rd season of the Verizon IndyCar Series and the 107th official championship season of American open-wheel car racing. The premier event was the 102nd Indianapolis 500, with Takuma Sato entering as the defending Indianapolis 500 winner. Josef Newgarden entered the season as the defending National Champion.

The season marked the debut of a new universal aerokit, replacing the manufacturer-designed kits used from 2015 to 2017.

It was the final season for Verizon Communications as the series sponsor as well as being the final season that the series was broadcast by both ABC and NBC Sports. A new series sponsor was introduced and NBC became the sole broadcaster for the series beginning in the 2019 season.

Honda won the engine manufacturer's championship for the first time since 2005 as an engine manufacturer competitor. Robert Wickens won Rookie of the Year despite missing the final three races after the season was overshadowed by a near life ending crash by Wickens at the ABC Supply 500 at Pocono that left him paralyzed. James Hinchcliffe won the most popular driver award. Will Power won the 102nd Indianapolis 500. Scott Dixon won his fifth IndyCar title, and is now second to A. J. Foyt's all-time record for United States open wheel titles. Dixon won three races over the course of the season.

The following teams, entries, and drivers have been announced to compete in the 2018 Verizon IndyCar Series season. All teams will use a spec Dallara DW12 chassis with UAK18 aero kit and Firestone tires.

Chip Ganassi Racing announced that the team will scale down to a two-car team for the first time since 2010 due to cost efficiency, with Scott Dixon remaining at the No. 9 car. CGR announced on October 25, 2017, that 2017 IndyCar Series Rookie of the Year Ed Jones would drive the No. 10 car in 2018, replacing Tony Kanaan.

Team Penske also downsized to three cars, due to Hélio Castroneves moving to Team Penske's WeatherTech SportsCar Championship team from the 2018 season onwards. However, Castroneves returned for the 2018 Indianapolis 500 with Team Penske for a one-off appearance.

Michael Shank Racing competed in six races in the 2018 season with driver Jack Harvey, with a technical partnership with Schmidt Peterson Motorsports. The team was renamed Meyer Shank Racing on April 6, 2018, after Sirius XM CEO Jim Meyer joined as a team co-owner.