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Color code:
- Democratic Controlled Chambers - Blue
- Republican Controlled Chambers - Red
- Mixed Chambers - Purple
- Democratic Supermajority States - Dark Blue
- Democratic Supermajority States - Dark Red
2021 Partisan Splits
Governors: 23D - 27R
State Legislative Chambers: 37D – 62R
Updated 5/12/2021
| State | Chamber | Party Control | Dem. | Rep. | Ind. | Vac. | Other | Total Seats |
|---|---|---|---|---|---|---|---|---|
| Alabama | House | R - Supermajority | 28 | 75 | 2 | 105 | ||
| Alabama | Senate | R - Supermajority | 8 | 27 | 35 | |||
| Alaska | House | D | 14 | 21 | 4 | 1 | 40 | |
| Alaska | Senate | R | 7 | 13 | 20 | |||
| Arizona | House | R | 29 | 31 | 60 | |||
| Arizona | Senate | R | 14 | 16 | 30 | |||
| Arkansas | House | R - Supermajority | 23 | 77 | 100 | |||
| Arkansas | Senate | R - Supermajority | 7 | 27 | 1 | 35 | ||
| California | Assembly | D - Supermajority | 60 | 19 | 1 | 80 | ||
| California | Senate | D - Supermajority | 31 | 9 | 40 | |||
| Colorado | House | D | 41 | 24 | 65 | |||
| Colorado | Senate | D | 20 | 15 | 35 | |||
| Connecticut | House | D - Supermajority | 99 | 51 | 150 | |||
| Connecticut | Senate | D | 23 | 12 | 1 | 36 | ||
| Delaware | House | D | 26 | 15 | 41 | |||
| Delaware | Senate | D - Supermajority | 14 | 7 | 21 | |||
| Florida | House | R | 42 | 78 | 120 | |||
| Florida | Senate | R | 16 | 24 | 40 | |||
| Georgia | House | R | 77 | 102 | 1 | 180 | ||
| Georgia | Senate | R | 21 | 35 | 56 | |||
| Hawaii | House | D - Supermajority | 47 | 4 | 51 | |||
| Hawaii | Senate | D - Supermajority | 24 | 1 | 25 | |||
| Idaho | House | R - Supermajority | 12 | 58 | 70 | |||
| Idaho | Senate | R - Supermajority | 7 | 28 | 35 | |||
| Illinois | House | D - Supermajority | 72 | 46 | 118 | |||
| Illinois | Senate | D - Supermajority | 39 | 17 | 3 | 59 | ||
| Indiana | House | R - Supermajority | 31 | 69 | 100 | |||
| Indiana | Senate | R - Supermajority | 11 | 39 | 50 | |||
| Iowa | House | R | 41 | 59 | 100 | |||
| Iowa | Senate | R | 18 | 31 | 1 | 50 | ||
| Kansas | House | R - Supermajority | 37 | 88 | 125 | |||
| Kansas | Senate | R - Supermajority | 11 | 29 | 40 | |||
| Kentucky | House | R - Supermajority | 25 | 75 | 100 | |||
| Kentucky | Senate | R - Supermajority | 9 | 29 | 38 | |||
| Louisiana | House | R | 35 | 68 | 2 | 105 | ||
| Louisiana | Senate | R - Supermajority | 12 | 27 | 39 | |||
| Maine | House | D | 79 | 68 | 4 | 151 | ||
| Maine | Senate | D | 23 | 12 | 35 | |||
| Maryland | House | D - Supermajority | 98 | 42 | 1 | 141 | ||
| Maryland | Senate | D - Supermajority | 32 | 14 | 1 | 47 | ||
| Massachusetts | House | D - Supermajority | 129 | 30 | 1 | 160 | ||
| Massachusetts | Senate | D - Supermajority | 37 | 3 | 40 | |||
| Michigan | House | R | 52 | 58 | 110 | |||
| Michigan | Senate | R | 16 | 22 | 38 | |||
| Minnesota | House | D | 70 | 64 | 134 | |||
| Minnesota | Senate | R | 33 | 34 | 67 | |||
| Mississippi | House | R | 46 | 75 | 1 | 122 | ||
| Mississippi | Senate | R - Supermajority | 16 | 36 | 52 | |||
| Missouri | House | R - Supermajority | 49 | 114 | 163 | |||
| Missouri | Senate | R - Supermajority | 10 | 24 | 34 | |||
| Montana | House | R - Supermajority | 32 | 68 | 100 | |||
| Montana | Senate | R - Supermajority | 19 | 31 | 50 | |||
| Nebraska | Unicameral | NP *** | 49 | 49 | ||||
| Nevada | Assembly | D | 26 | 16 | 42 | |||
| Nevada | Senate | D | 11 | 9 | 1 | 21 | ||
| New Hampshire | House | R ** | 187 | 213 | 400 | |||
| New Hampshire | Senate | R ** | 10 | 14 | 24 | |||
| New Jersey | House | D | 50 | 30 | 80 | |||
| New Jersey | Senate | D | 26 | 14 | 40 | |||
| New Mexico | House | D | 44 | 25 | 1 | 70 | ||
| New Mexico | Senate | D | 27 | 15 | 42 | |||
| New York | Assembly | D - Supermajority | 106 | 43 | 1 | 150 | ||
| New York | Senate | D - Supermajority | 43 | 20 | 63 | |||
| North Carolina | House | R | 51 | 69 | 120 | |||
| North Carolina | Senate | R | 22 | 28 | 50 | |||
| North Dakota | House | R - Supermajority | 14 | 80 | 94 | |||
| North Dakota | Senate | R - Supermajority | 7 | 40 | 47 | |||
| Ohio | House | R | 35 | 64 | 99 | |||
| Ohio | Senate | R - Supermajority | 8 | 25 | 33 | |||
| Oklahoma | House | R - Supermajority | 19 | 82 | 101 | |||
| Oklahoma | Senate | R - Supermajority | 9 | 39 | 48 | |||
| Oregon | House | D | 36 | 23 | 1 | 60 | ||
| Oregon | Senate | D | 18 | 12 | 30 | |||
| Pennsylvania | House | R | 90 | 113 | 203 | |||
| Pennsylvania | Senate | R | 21 | 27 | 1 | 1 | 50 | |
| Rhode Island | House | D - Supermajority | 65 | 10 | 75 | |||
| Rhode Island | Senate | D - Supermajority | 33 | 5 | 38 | |||
| South Carolina | House | R | 43 | 81 | 124 | |||
| South Carolina | Senate | R | 16 | 30 | 46 | |||
| South Dakota | House | R - Supermajority | 8 | 62 | 70 | |||
| South Dakota | Senate | R - Supermajority | 2 | 33 | 35 | |||
| Tennessee | House | R - Supermajority | 26 | 73 | 99 | |||
| Tennessee | Senate | R - Supermajority | 6 | 27 | 33 | |||
| Texas | House | R | 66 | 84 | 150 | |||
| Texas | Senate | R | 13 | 18 | 31 | |||
| Utah | House | R - Supermajority | 17 | 58 | 75 | |||
| Utah | Senate | R - Supermajority | 6 | 23 | 29 | |||
| Vermont | House | D | 86 | 35 | 5 | 5 D/P, 1 D/R, 7 P/D, 11 R/D | 150 | |
| Vermont | Senate | D - Supermajority | 23 | 7 | 30 | |||
| Virginia | House | D | 55 | 45 | 100 | |||
| Virginia | Senate | D | 21 | 18 | 1 | 40 | ||
| Washington | House | D | 57 | 41 | 98 | |||
| Washington | Senate | D | 29 | 20 | 49 | |||
| West Virginia | House | R - Supermajority | 24 | 76 | 100 | |||
| West Virginia | Senate | R - Supermajority | 11 | 23 | 34 | |||
| Wisconsin | Assembly | R | 38 | 61 | 99 | |||
| Wisconsin | Senate | R | 12 | 20 | 33 | |||
| Wyoming | House | R - Supermajority | 7 | 51 | 1 | 1 L | 60 | |
| Wyoming | Senate | R - Supermajority | 2 | 28 | 30 |
** Party change from post 2020 election
*** Nebraska's Unicameral is officially nonpartisan, but most lawmakers are affiliated with the Republican Party
D - Democrat
R - Republican
I - Independent
L - Libertarian
NP - Non Partisan