The 2020 New Mexico Senate elections took place as part of the biennial United States elections. New Mexico voters elected state senators in all 42 of the state senate's districts. State senators serve four-year terms in the New Mexico Senate. A primary election on June 2, 2020 determined which candidates will appear on the November 3 general election ballot. Summary of results Closest races Seats where the margin of victory was under 10%: gain gain gain gain Retiring incumbents Two incumbent senators (one Republican and one Democrat) chose to not seek reelection. John Sapien (D), District 9 William Payne (R), District 20 Defeated incumbents In primary Seven incumbent senators (five Democrats and two Republicans) sought reelection but were defeated in the June 2 primary. The Democrats defeated in the primary were part of a conservative faction that were targeted by progressive groups for voting with Republicans to defeat certain bills including legalizing marijuana or to pass bills limiting abortion rights. Two of the challengers who unseated the incumbents went on to lose the general election: Pamela Cordova in the 30th and Neomi Martinez-Parra in the 35th. Richard Martinez (D), District 5 James White (R), District 19 Gabriel Ramos (D), District 28 Clemente Sanchez (D), District 30 John Arthur Smith (D), District 35 Mary Kay Papen (D), District 38 Gregg Fulfer (R), District 41 In general election Two incumbent senators, both Republicans, won their respective primaries but were defeated in the November 3 general election by their Democratic opponent. Candace Gould (R), District 10 Sander Rue (R), District 23 Predictions Detailed results Source for primary election results: District 1 District 2 District 3 Incumbent senator Shannon Pinto was appointed to the seat in May 2019 after the death of Democrat John Pinto (her grandfather). Democratic primary General election District 4 Democratic primary General election District 5 Democratic primary General election District 6 Incumbent Democrat Roberto Gonzales was appointed to the seat in December 2019 after the death of Democrat Carlos Cisneros. District 7 District 8 Democratic primary General election District 9 Democratic primary Republican primary General election District 10 Democratic primary General election District 11 District 12 District 13 District 14 District 15 District 16 Incumbent senator and former congressional candidate Antoinette Sedillo Lopez was appointed to the Senate in January 2019 after Democrat Cisco McSorley was named head of the Probation and Parole Division of the New Mexico Corrections Department.