2019 NASCAR K&N Pro Series West
The 2019 NASCAR K&N Pro Series West was the sixty-sixth season of the K&N Pro Series West, a regional stock car racing series sanctioned by NASCAR. It began with the Star Nursery 100 at the Las Vegas Motor Speedway Dirt Track on February 28, 2019 and concluded with the Arizona Lottery 100 at ISM Raceway on November 9, 2019. Derek Kraus was crowned the champion, ahead of Jagger Jones, his Bill McAnally Racing teammate Hailie Deegan, and Trevor Huddleston. Derek Thorn entered the season as the defending drivers' champion, but did not defend his championship as he did not return to his ride in 2019.
Starting this year, General Tire replaced Goodyear as the official tire supplier of the series. This was the last season of the series before it went under the ARCA banner the following year as part of the unification of the NASCAR K&N Pro Series East and West and the ARCA Menards Series. The series was renamed to the ARCA Menards Series West starting in 2020, meaning 2019 was also K&N's last year as the series title sponsor.
Drivers
;Notes:Schedule
On January 9, 2019, NASCAR announced the 2019 schedule. Orange Show and the first date at Kern County were dropped from the schedule in favor of Irwindale and Phoenix. All races in the season are televised on NBCSN on a tape delay basis and shown live on FansChoice.tv.| No. | Race Title | Track | Date |
| 1 | Star Nursery 100 | Las Vegas Motor Speedway Dirt Track, Las Vegas | February 28 |
| 2 | ENEOS NAPA Auto 150 | Irwindale Speedway, Irwindale | March 30 |
| 3 | Port of Tucson Twin 100s | Tucson Speedway, Tucson | May 11 |
| 4 | Port of Tucson Twin 100s | Tucson Speedway, Tucson | May 11 |
| 5 | NAPA Auto Parts 150 | Colorado National Speedway, Dacono | June 8 |
| 6 | Procore 200 | Sonoma Raceway, Sonoma | June 22 |
| 7 | Clint Newell Auto Group Toyota 150 | Douglas County Speedway, Roseburg | June 29 |
| 8 | Casey's General Store 150 | Iowa Speedway, Newton | July 26 |
| 9 | NAPA Auto Parts 150 Presented By ENEOS | Evergreen Speedway, Monroe | August 17 |
| 10 | Monaco Cocktails Gateway Classic 125 | World Wide Technology Raceway at Gateway, Madison | August 24 |
| 11 | NAPA Auto Parts Idaho 208 | Meridian Speedway, Meridian | September 28 |
| 12 | NAPA Auto Parts / ENEOS 150 | All American Speedway, Roseville | October 12 |
| 13 | NAPA / ENEOS 150 Presented by West Coast Stock Car Hall of Fame | Kern County Raceway Park, Bakersfield | October 26 |
| 14 | Arizona Lottery 100 | ISM Raceway, Avondale | November 9 |
;Notes:
Results and standings
Races
Drivers' championship
Bold – Pole position awarded by time. Italics – Pole position set by final practice results or Owners' points. * – Most laps led. ** – All laps led.;Notes:
- 1 – John Wood qualified in the No. 38 for Armani Williams.
- 2 – Billy Kann and John Wood received championship points, despite the fact that they did not start the race.
- 3 – Scored points towards the K&N Pro Series East.
- 4 – Corey Heim and No. 22 got DQ'd since it was an ARCA car testing the package for 2020 merge and the car did not met all the specifications in the post-race inspection.