California’s state legislature has 40 Senate Districts and 80 Assembly Districts, with Senators representing twice the population that Assemblymembers do. Unfortunately, the numbers don’t correspond exactly (with Senate District 1 being composed of Assembly Districts 1 and 2), so the table below is provided to provide a rough guide to which Assembly Districts make up most of each Senate District.
NOTE: This list is from the 2011 redistricting and was in effect for odd-numbered Senate Districts 2012-2024, and for even-numbered Senate Districts 2014-2022. You will probably be far more interested in the table for the current districts.
| Senate District 1 | Assembly Districts 01 & 06 |
| Senate District 2 | Assembly Districts 02 & 10 |
| Senate District 3 | Assembly Districts 04 & 11 |
| Senate District 4 | Assembly Districts 03 & 08 |
| Senate District 5 | Assembly Districts 12 & 13 |
| Senate District 6 | Assembly Districts 07 & 08 |
| Senate District 7 | Assembly Districts 14 & 16 |
| Senate District 8 | Assembly Districts 23 & 05 |
| Senate District 9 | Assembly Districts 15 & 18 |
| Senate District 10 | Assembly Districts 20 & 25 |
| Senate District 11 | Assembly Districts 17 & 19 |
| Senate District 12 | Assembly Districts 21 & 30 |
| Senate District 13 | Assembly Districts 22 & 24 |
| Senate District 14 | Assembly Districts 31 & 32 |
| Senate District 15 | Assembly Districts 27 & 28 |
| Senate District 16 | Assembly Districts 26 & 34 |
| Senate District 17 | Assembly Districts 29 & 35 |
| Senate District 18 | Assembly Districts 39 & 46 |
| Senate District 19 | Assembly Districts 37 & 44 |
| Senate District 20 | Assembly Districts 47 & 52 |
| Senate District 21 | Assembly Districts 33 & 36 |
| Senate District 22 | Assembly Districts 48 & 49 |
| Senate District 23 | Assembly Districts 40 & 42 |
| Senate District 24 | Assembly Districts 51 & 53 |
| Senate District 25 | Assembly Districts 41 & 43 |
| Senate District 26 | Assembly Districts 50 & 66 |
| Senate District 27 | Assembly Districts 38 & 45 |
| Senate District 28 | Assembly Districts 56 & 67 |
| Senate District 29 | Assembly Districts 55 & 65 |
| Senate District 30 | Assembly Districts 54 & 59 |
| Senate District 31 | Assembly Districts 60 & 61 |
| Senate District 32 | Assembly Districts 57 & 58 |
| Senate District 33 | Assembly Districts 63 &70 |
| Senate District 34 | Assembly Districts 69 & 72 |
| Senate District 35 | Assembly Districts 62 & 64 |
| Senate District 36 | Assembly Districts 73 & 76 |
| Senate District 37 | Assembly Districts 68 & 74 |
| Senate District 38 | Assembly Districts 71 & 75 |
| Senate District 39 | Assembly Districts 77 & 78 |
| Senate District 40 | Assembly Districts 79 & 80 |
