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            November 05, 2024
County Supervisor
| Candidate | Party | Votes | % | |
|---|---|---|---|---|
| 
                                  
                                    Janet Nguyen
                                  
                                    
                                State Senator/businesswoman | - | 160,036 | 61.2% |  | 
| 
                                  
                                    Frances Marquez
                                  
                                Cypress City Councilmember | - | 101,296 | 38.8% |  | 
| Total | 261,332 | 
March 05, 2024
County Supervisor
| Candidate | Party | Votes | % | |
|---|---|---|---|---|
| 
                                  
                                    Janet Nguyen
                                  
                                    
                                State Senator/Businesswoman | - | 59,702 | 43.5% |  | 
| 
                                  
                                    Frances Marquez
                                  
                                    
                                Cypress City Councilmember | - | 35,687 | 26.0% |  | 
| 
                                  
                                    Van Tran
                                  
                                Orange County Supervisor's Chief | - | 24,717 | 18.0% |  | 
| 
                                  
                                    Kimberly Ho
                                  
                                City of Westminster Councilmember/Entrepreneur | - | 8,683 | 6.3% |  | 
| 
                                  
                                    Michael Vo
                                  
                                Small Business Owner | - | 8,599 | 6.3% |  | 
| Total | 137,388 | 
November 03, 2020
County Supervisor
| Candidate | Party | Votes | % | |
|---|---|---|---|---|
| 
                                  
                                    Andrew Do
                                  
                                    
                                Orange County Supervisor, District 1 | - | 106,252 | 51.8% |  | 
| 
                                  
                                    Sergio Contreras
                                  
                                Westminster City Councilmember | - | 98,693 | 48.2% |  | 
| Total | 204,945 | 
March 03, 2020
County Supervisor
| Candidate | Party | Votes | % | |
|---|---|---|---|---|
| 
                                  
                                    Andrew Do
                                  
                                    
                                Orange County Supervisor, District 1 | - | 40,999 | 42.3% |  | 
| 
                                  
                                    Sergio Contreras
                                  
                                    
                                Westminster City Councilmember | - | 21,721 | 22.4% |  | 
| 
                                  
                                    Miguel A. Pulido
                                  
                                Mayor, City of Santa Ana | - | 19,616 | 20.2% |  | 
| 
                                  
                                    Kim Bernice Nguyen
                                  
                                Garden Grove City Councilwoman | - | 14,570 | 15.0% |  | 
| Total | 96,906 | 
November 08, 2016
County Supervisor
| Candidate | Party | Votes | % | |
|---|---|---|---|---|
| 
                                  
                                    Andrew Do
                                  
                                    
                                Orange County Supervisor, 1st district | - | 76,211 | 50.2% |  | 
| 
                                  
                                    Michele Martinez
                                  
                                City Councilwoman/Educator | - | 75,563 | 49.8% |  | 
| Total | 151,774 | 
June 07, 2016
County Supervisor
| Candidate | Party | Votes | % | |
|---|---|---|---|---|
| 
                                  
                                    Michele Martinez
                                  
                                    
                                City Councilwoman/Educator | - | 34,235 | 38.1% |  | 
| 
                                  
                                    Andrew Do
                                  
                                    
                                Orange County Supervisor, 1st district | - | 30,888 | 34.3% |  | 
| 
                                  
                                    Phat Bui
                                  
                                Councilman/Business Owner | - | 16,677 | 18.5% |  | 
| 
                                  
                                    Steve Rocco
                                  
                                Retired Educator/Writer | - | 8,155 | 9.1% |  | 
| Total | 89,955 | 
June 05, 2012
County Supervisor
| Candidate | Party | Votes | % | |
|---|---|---|---|---|
| 
                                  
                                    Janet Nguyen
                                  
                                    
                                Orange County Supervisor, 1st District | - | 37,106 | 74.2% |  | 
| 
                                  
                                    Steve Rocco
                                  
                                Retired Educator | - | 12,902 | 25.8% |  | 
| Total | 50,008 | 
