2023 British Touring Car Championship

The 2023 Kwik Fit British Touring Car Championship (commonly abbreviated as BTCC) was a motor racing championship for production-based touring cars held across England and Scotland. The championship featured a mix of professional motor racing teams and privately funded amateur drivers competing in highly modified versions of family cars which are sold to the general public and conform to the technical regulations for the championship. The 2023 season was the 66th British Touring Car Championship season and the 13th season for cars conforming to the Next Generation Touring Car (NGTC) technical specification.

Teams and drivers
Entering/re-entering BTCC Changed teams
 * Nick Halstead returned to the series with Bristol Street Motors with Excelr8 TradePriceCars.com, having last raced in 2021 at Croft to replace Rick Parfitt Jr.
 * Andrew Watson debuted with CarStore Power Maxed Racing.
 * Ronan Pearson debuted with Bristol Street Motors with Excelr8 TradePriceCars.com, replacing Jack Butel.
 * 2022 Ginetta GT5 and BMW Compact Cup winner Mikey Doble debuted with Power Maxed Racing.
 * Adam Morgan moved from Car Gods with Ciceley Motorsport to Team BMW.
 * Dexter Patterson moved from Laser Tools Racing to Re.Beverages and Bartercard with Team HARD.
 * Dan Lloyd and Jack Butel both moved from Bristol Street Motors with Excelr8 TradePriceCars.com to Autobrite Direct with Millers Oils.
 * Aiden Moffat moved from Laser Tools Racing to One Motorsport with Starline Racing.
 * Daniel Rowbottom moved from Halfords Racing with Cataclean to NAPA Racing UK with Cataclean.
 * Árón Taylor-Smith moved from Yazoo with Safuu.com Racing to CarStore Power Maxed Racing.
 * George Gamble moved from Car Gods with Ciceley Motorsport to Toyota Gazoo Racing.
 * Jade Edwards moved from Rich Energy BTC Racing to Re.Beverages and Bartercard with Team HARD.
 * Will Powell moved from Autobrite Direct with Journey Hero to One Motorsport with Starline Racing.

Leaving BTCC
 * Jason Plato retired from the series.
 * Ollie Jackson left the series to compete in the 2023 Porsche Carrera Cup Great Britain.
 * Gordon Shedden was left without a drive following the departure of Team Dynamics from the series.
 * Ash Hand did not return following his debut season with Power Maxed Racing.

Team changes
 * Ciceley Motorsport left the series.
 * Laser Tools Racing switched from Aiden Moffat Racing to MB Motorsport.
 * BTC Racing rebranded ahead of this season to One Motorsport with Starline Racing.
 * Team Dynamics announced they would be taking a hiatus from the BTCC grid in 2023 with the hopes of returning to the championship in the future, but would provide support for the One Motorsport team during the season.

Mid-Season Changes
 * Will Powell was dismissed from One Motorsport during the summer break and was replaced by Jade Edwards who rejoined the team after spending the first half of the season at Team HARD.
 * Daryl DeLeon made his BTCC debut at Croft, replacing Jade Edwards who joined One Motorsport.
 * Bobby Thompson was forced to step down from his seat following the fifth round due to financial issues, and was replaced by Michael Crees who rejoined the team he previously raced for in 2019.
 * Nicolas Hamilton stepped down from his seat following the sixth round and was replaced by Rob Huff for the seventh round, and then Bobby Thompson for the final two.
 * Rob Huff returned to the series for one round at Knockhill.
 * Bobby Thompson returned to Team HARD for the final two rounds after regaining sufficient financial backing.
 * James Gornall returned to the series for the final round driving for Go-Fix with Autoaid Breakdown, replacing Jack Butel.

Race calendar
The 2023 calendar was announced on 31 May 2022. The Grand Prix layout of Donington Park returned to the calendar for the first time since 2002, taking the place of the second Thruxton round.

Drivers' Championship

 * Notes
 * The point for leading laps in race is one point, regardless of how many laps led

Teams' Championship
* denotes penalty

Independent Drivers' Championship
* denotes penalty

Independent Teams' Championship
* denotes penalty

Manufacturers' Championship
* denotes penalty

Jack Sears Trophy
* denotes penalty