| Election Name: | 2024 Orange County, California elections |
| Flag Image: | Flag of Orange County, California.svg |
| Ongoing: | yes |
| Election Date: | March 5 and November 5, 2024 |
| Previous Election: | 2022 Orange County, California elections |
| Previous Year: | 2022 |
| Next Election: | 2026 Orange County, California elections |
| Next Year: | 2026 |
| Election Name: | 2024 Orange County Board of Supervisors elections |
| Country: | United States |
| Flag Image: | Flag of Orange County, California.svg |
| Type: | legislative |
| Ongoing: | yes |
| Previous Election: | 2022 Orange County Board of Supervisors election |
| Previous Year: | 2022 |
| Election Date: | March 5, 2024 November 5, 2024 (runoffs, if necessary) |
| Next Election: | 2026 Orange County Board of Supervisors election |
| Next Year: | 2026 |
| Seats For Election: | 2 of 5 seats on the Orange County Board of Supervisors |
| Party1: | Democratic Party (United States) |
| Last Election1: | 3 |
| Seats Before1: | 3 |
| Party2: | Republican Party (United States) |
| Last Election2: | 2 |
| Seats Before2: | 2 |
| Map Size: | 150px |
The 2024 Orange County, California elections were held on March 5, 2024 (for general elections) and November 5, 2024 (for runoff elections). Two Board of Supervisors seats (districts 1 and 3) are the only county offices up for election in presidential years. The other county supervisorial district seats (districts 2, 4, and 5) and countywide offices are up for election in midterm years. County elections in California are officially nonpartisan.
The 2024 Orange County Board of Supervisors elections were held on March 5, 2024 (for general elections) and November 5, 2024 (for runoff elections). Municipal elections in California are officially nonpartisan.
Two of the five seats of the Orange County, California Board of Supervisors will be up for election. The Democratic Party currently holds three seats on the board, while the Republican Party holds two.
County elections in California are officially nonpartisan. The parties below identify which party label each candidate would have run under if given the option.
| Election Name: | 2022 Orange County Board of Supervisors District 1 election |
| Flag Image: | Flag of Orange County, California.png |
| Type: | presidential |
| Ongoing: | yes |
| Previous Election: | 2020 Orange County Board of Supervisors election#District 1 |
| Previous Year: | 2020 |
| Next Election: | 2028 Orange County Board of Supervisors election#District 1 |
| Next Year: | 2028 |
| Election Date: | March 5 and November 5, 2024 |
| 1Blank: | First round |
| 2Blank: | Runoff |
| Image1: | Janetnguyun (cropped).png |
| Candidate1: | Janet Nguyen |
| Color1: | c0c0c0 |
| 1Data1: | 59,702 43.46% |
| 2Data1: | TBD |
| Candidate2: | Frances Marquez |
| Color2: | c0c0c0 |
| 1Data2: | 35,687 25.98% |
| 2Data2: | TBD |
| Image3: | Mempic Tran (cropped).jpg |
| Candidate3: | Van Tran |
| Color3: | c0c0c0 |
| 1Data3: | 24,717 17.99% |
| 2Data3: | Eliminated |
| Image4: | Councilwoman Kimberly Ho.jpg |
| Candidate4: | Kimberly Ho |
| Color4: | c0c0c0 |
| 1Data4: | 8,683 6.32% |
| 2Data4: | Eliminated |
| Image5: | MichaelVo-2016 (cropped).jpg |
| Candidate5: | Michael Vo |
| Color5: | c0c0c0 |
| 1Data5: | 8,599 6.26% |
| 2Data5: | Eliminated |
| Map Size: | 150px |
| Supervisor | |
| Before Election: | Andrew Do |
The 1st district includes Huntington Beach, as well as Fountain Valley, Seal Beach, Westminster, and most of Garden Grove. Incumbent Andrew Do, a Republican, is term-limited and ineligible to run for a third term.
Because no candidate received a majority of the vote in the first round in March, State Senator Janet Nguyen and Cypress city council member Frances Marquez advanced to a runoff, which will be held on November 5, 2024.
| Election Name: | 2024 Orange County Board of Supervisors District 3 election |
| Flag Image: | Flag of Orange County, California.png |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2020 Orange County Board of Supervisors election#District 3 |
| Previous Year: | 2020 |
| Next Election: | 2028 Orange County Board of Supervisors election#District 3 |
| Next Year: | 2028 |
| Election Date: | March 5, 2024 |
| 1Blank: | First round |
| Image1: | Donald Wagner Official City Portrait.jpg |
| Candidate1: | Donald Wagner |
| Color1: | c0c0c0 |
| 1Data1: | 97,706 63.48% |
| Candidate2: | Farrah Khan |
| Color2: | c0c0c0 |
| 1Data2: | 56,207 36.52% |
| Supervisor | |
| Before Election: | Donald Wagner |
| After Election: | Donald Wagner |
The 3rd district includes Irvine and portions of Orange and Anaheim. Incumbent Republican Donald Wagner ran for re-election.
Incumbent Donald Wagner won a majority of the vote on March 5, winning re-election in the first round and avoiding a runoff.