| District ID | 1st District |
| Representative | Doug LaMalfa |
| Party Affiliation | Republican |
| Partisan Voting Index (PVI) | R+11 |
| 96137 |
| 96136 |
| 96134 |
| 96132 |
| 96130 |
| 96128 |
| 96123 |
| 96121 |
| 96119 |
| 96117 |
| 96116 |
| 96115 |
| 96114 |
| 96113 |
| 96112 |
| 96110 |
| 96109 |
| 96108 |
| 96104 |
| 96101 |
| 96097 |
| 96096 |
| 96095 |
| 96094 |
| 96092 |
| 96090 |
| 96089 |
| 96088 |
| 96087 |
| 96086 |
| 96085 |
| 96084 |
| 96080 |
| 96078 |
| 96076 |
| 96075 |
| 96074 |
| 96073 |
| 96071 |
| 96069 |
| 96068 |
| 96067 |
| 96065 |
| 96064 |
| 96062 |
| 96061 |
| 96059 |
| 96058 |
| 96057 |
| 96056 |
| 96055 |
| 96054 |
| 96051 |
| 96050 |
| 96047 |
| 96044 |
| 96040 |
| 96039 |
| 96038 |
| 96037 |
| 96035 |
| 96034 |
| 96033 |
| 96032 |
| 96031 |
| 96029 |
| 96028 |
| 96027 |
| 96025 |
| 96023 |
| 96022 |
| 96021 |
| 96019 |
| 96017 |
| 96016 |
| 96015 |
| 96014 |
| 96013 |
| 96011 |
| 96009 |
| 96008 |
| 96007 |
| 96006 |
| 96003 |
| 96002 |
| 96001 |
| 95993 |
| 95991 |
| 95988 |
| 95987 |
| 95982 |
| 95979 |
| 95978 |
| 95974 |
| 95973 |
| 95970 |
| 95969 |
| 95968 |
| 95966 |
| 95965 |
| 95963 |
| 95961 |
| 95957 |
| 95955 |
| 95954 |
| 95953 |
| 95951 |
| 95948 |
| 95943 |
| 95942 |
| 95941 |
| 95939 |
| 95938 |
| 95932 |
| 95930 |
| 95928 |
| 95926 |
| 95920 |
| 95917 |
| 95916 |
| 95914 |
| 95913 |
| 95912 |
| 95903 |
| 95901 |
| 95836 |
| 95692 |
| 95676 |
| 95674 |
| 95668 |
| 95659 |
| 95645 |
| 95626 |
| 95568 |
| 95428 |