Adam R Brown
Department of Political Science, Brigham Young University
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How many Republicans and Democrats serve in state legislatures?
The partisan balance in the state legislatures tends to follow national partisan trends. Here are some data from February 2011.
ENPP is "effective number of political parties," measured using Laakso and Taagepera's (1979) formula If a legislature is evenly divided between Republicans and Democrats, ENPP is 2. As the balance shifts toward one party, ENPP moves toward 1. For purposes of calculating this number, I treat "other" as if it were a single party, which will tend to depress the estimate slightly (especially in Nebraska).
Click a column name to sort by that variable. Click a state or chamber name to see a list of legislators from that state/chamber.
| State | Chamber | Size | Democrats | Republicans | Other | ENPP | Graph |
|---|---|---|---|---|---|---|---|
| National average | Lower | 5391 | 2457 (46%) | 2896 (54%) | 38 (1%) | 2.01 | |
| Upper | 1961 | 879 (45%) | 1026 (52%) | 56 (3%) | 2.10 | ||
| Alabama | Lower | 104 | 39 (38%) | 65 (63%) | 0 (0%) | 1.88 | |
| Upper | 35 | 12 (34%) | 22 (63%) | 1 (3%) | 1.95 | ||
| Alaska | Lower | 40 | 16 (40%) | 24 (60%) | 0 (0%) | 1.92 | |
| Upper | 20 | 10 (50%) | 10 (50%) | 0 (0%) | 2.00 | ||
| Arizona | Lower | 60 | 20 (33%) | 40 (67%) | 0 (0%) | 1.80 | |
| Upper | 30 | 9 (30%) | 21 (70%) | 0 (0%) | 1.72 | ||
| Arkansas | Lower | 98 | 54 (55%) | 44 (45%) | 0 (0%) | 1.98 | |
| Upper | 35 | 20 (57%) | 15 (43%) | 0 (0%) | 1.96 | ||
| California | Lower | 79 | 52 (66%) | 27 (34%) | 0 (0%) | 1.82 | |
| Upper | 40 | 25 (63%) | 15 (38%) | 0 (0%) | 1.88 | ||
| Colorado | Lower | 65 | 32 (49%) | 33 (51%) | 0 (0%) | 2.00 | |
| Upper | 35 | 20 (57%) | 15 (43%) | 0 (0%) | 1.96 | ||
| Connecticut | Lower | 145 | 95 (66%) | 50 (34%) | 0 (0%) | 1.82 | |
| Upper | 33 | 20 (61%) | 13 (39%) | 0 (0%) | 1.91 | ||
| Delaware | Lower | 41 | 26 (63%) | 15 (37%) | 0 (0%) | 1.87 | |
| Upper | 21 | 14 (67%) | 7 (33%) | 0 (0%) | 1.80 | ||
| Florida | Lower | 120 | 39 (33%) | 81 (68%) | 0 (0%) | 1.78 | |
| Upper | 39 | 11 (28%) | 28 (72%) | 0 (0%) | 1.68 | ||
| Georgia | Lower | 179 | 63 (35%) | 115 (64%) | 1 (1%) | 1.86 | |
| Upper | 56 | 20 (36%) | 36 (64%) | 0 (0%) | 1.85 | ||
| Hawaii | Lower | 51 | 43 (84%) | 8 (16%) | 0 (0%) | 1.36 | |
| Upper | 25 | 24 (96%) | 1 (4%) | 0 (0%) | 1.08 | ||
| State | Chamber | Size | Democrats | Republicans | Other | ENPP | Graph |
| Idaho | Lower | 70 | 13 (19%) | 57 (81%) | 0 (0%) | 1.43 | |
| Upper | 35 | 7 (20%) | 28 (80%) | 0 (0%) | 1.47 | ||
| Illinois | Lower | 118 | 64 (54%) | 54 (46%) | 0 (0%) | 1.99 | |
| Upper | 58 | 34 (59%) | 24 (41%) | 0 (0%) | 1.94 | ||
| Indiana | Lower | 100 | 40 (40%) | 60 (60%) | 0 (0%) | 1.92 | |
| Upper | 50 | 13 (26%) | 37 (74%) | 0 (0%) | 1.63 | ||
| Iowa | Lower | 100 | 39 (39%) | 60 (60%) | 1 (1%) | 1.95 | |
| Upper | 50 | 26 (52%) | 23 (46%) | 1 (2%) | 2.07 | ||
| Kansas | Lower | 125 | 33 (26%) | 92 (74%) | 0 (0%) | 1.64 | |
| Upper | 40 | 8 (20%) | 32 (80%) | 0 (0%) | 1.47 | ||
| Kentucky | Lower | 100 | 58 (58%) | 42 (42%) | 0 (0%) | 1.95 | |
| Upper | 38 | 15 (39%) | 22 (58%) | 1 (3%) | 2.03 | ||
| Louisiana | Lower | 104 | 48 (46%) | 52 (50%) | 4 (4%) | 2.15 | |
| Upper | 38 | 19 (50%) | 19 (50%) | 0 (0%) | 2.00 | ||
| Maine | Lower | 152 | 72 (47%) | 77 (51%) | 3 (2%) | 2.08 | |
| Upper | 35 | 14 (40%) | 20 (57%) | 1 (3%) | 2.05 | ||
| Maryland | Lower | 141 | 98 (70%) | 43 (30%) | 0 (0%) | 1.74 | |
| Upper | 47 | 35 (74%) | 12 (26%) | 0 (0%) | 1.61 | ||
| Massachusetts | Lower | 159 | 128 (81%) | 31 (19%) | 0 (0%) | 1.46 | |
| Upper | 40 | 36 (90%) | 4 (10%) | 0 (0%) | 1.22 | ||
| Michigan | Lower | 110 | 47 (43%) | 63 (57%) | 0 (0%) | 1.96 | |
| Upper | 38 | 12 (32%) | 26 (68%) | 0 (0%) | 1.76 | ||
| State | Chamber | Size | Democrats | Republicans | Other | ENPP | Graph |
| Minnesota | Lower | 133 | 61 (46%) | 72 (54%) | 0 (0%) | 1.99 | |
| Upper | 67 | 30 (45%) | 37 (55%) | 0 (0%) | 1.98 | ||
| Mississippi | Lower | 122 | 72 (59%) | 50 (41%) | 0 (0%) | 1.94 | |
| Upper | 51 | 25 (49%) | 26 (51%) | 0 (0%) | 2.00 | ||
| Missouri | Lower | 163 | 57 (35%) | 106 (65%) | 0 (0%) | 1.83 | |
| Upper | 33 | 7 (21%) | 26 (79%) | 0 (0%) | 1.50 | ||
| Montana | Lower | 100 | 32 (32%) | 68 (68%) | 0 (0%) | 1.77 | |
| Upper | 50 | 22 (44%) | 28 (56%) | 0 (0%) | 1.97 | ||
| Nebraska | Upper | 49 | 0 (0%) | 0 (0%) | 49 (100%) | 1.00 | |
| Nebraska has a nonpartisan unicameral legislature. | |||||||
| Nevada | Lower | 42 | 26 (62%) | 16 (38%) | 0 (0%) | 1.89 | |
| Upper | 21 | 11 (52%) | 10 (48%) | 0 (0%) | 2.00 | ||
| New Hampshire | Lower | 399 | 100 (25%) | 296 (74%) | 3 (1%) | 1.63 | |
| Upper | 24 | 5 (21%) | 19 (79%) | 0 (0%) | 1.49 | ||
| New Jersey | Lower | 80 | 47 (59%) | 33 (41%) | 0 (0%) | 1.94 | |
| Upper | 40 | 24 (60%) | 16 (40%) | 0 (0%) | 1.92 | ||
| New Mexico | Lower | 70 | 37 (53%) | 33 (47%) | 0 (0%) | 1.99 | |
| Upper | 42 | 27 (64%) | 15 (36%) | 0 (0%) | 1.85 | ||
| New York | Lower | 149 | 98 (66%) | 45 (30%) | 6 (4%) | 1.90 | |
| Upper | 62 | 30 (48%) | 32 (52%) | 0 (0%) | 2.00 | ||
| North Carolina | Lower | 120 | 52 (43%) | 67 (56%) | 1 (1%) | 2.00 | |
| Upper | 50 | 19 (38%) | 31 (62%) | 0 (0%) | 1.89 | ||
| North Dakota | Lower | 94 | 25 (27%) | 69 (73%) | 0 (0%) | 1.64 | |
| Upper | 47 | 12 (26%) | 35 (74%) | 0 (0%) | 1.61 | ||
| State | Chamber | Size | Democrats | Republicans | Other | ENPP | Graph |
| Ohio | Lower | 99 | 40 (40%) | 59 (60%) | 0 (0%) | 1.93 | |
| Upper | 33 | 10 (30%) | 23 (70%) | 0 (0%) | 1.73 | ||
| Oklahoma | Lower | 101 | 31 (31%) | 70 (69%) | 0 (0%) | 1.74 | |
| Upper | 48 | 16 (33%) | 30 (63%) | 2 (4%) | 1.99 | ||
| Oregon | Lower | 60 | 30 (50%) | 30 (50%) | 0 (0%) | 2.00 | |
| Upper | 30 | 16 (53%) | 14 (47%) | 0 (0%) | 1.99 | ||
| Pennsylvania | Lower | 203 | 91 (45%) | 112 (55%) | 0 (0%) | 1.98 | |
| Upper | 49 | 19 (39%) | 30 (61%) | 0 (0%) | 1.90 | ||
| Rhode Island | Lower | 75 | 65 (87%) | 10 (13%) | 0 (0%) | 1.30 | |
| Upper | 38 | 29 (76%) | 8 (21%) | 1 (3%) | 1.59 | ||
| South Carolina | Lower | 123 | 47 (38%) | 76 (62%) | 0 (0%) | 1.89 | |
| Upper | 45 | 19 (42%) | 26 (58%) | 0 (0%) | 1.95 | ||
| South Dakota | Lower | 70 | 19 (27%) | 50 (71%) | 1 (1%) | 1.71 | |
| Upper | 35 | 5 (14%) | 30 (86%) | 0 (0%) | 1.32 | ||
| Tennessee | Lower | 99 | 34 (34%) | 65 (66%) | 0 (0%) | 1.82 | |
| Upper | 33 | 13 (39%) | 20 (61%) | 0 (0%) | 1.91 | ||
| Texas | Lower | 150 | 49 (33%) | 101 (67%) | 0 (0%) | 1.79 | |
| Upper | 31 | 12 (39%) | 19 (61%) | 0 (0%) | 1.90 | ||
| Utah | Lower | 75 | 17 (23%) | 58 (77%) | 0 (0%) | 1.54 | |
| Upper | 29 | 7 (24%) | 22 (76%) | 0 (0%) | 1.58 | ||
| Vermont | Lower | 150 | 99 (66%) | 35 (23%) | 16 (11%) | 1.99 | |
| Upper | 30 | 22 (73%) | 8 (27%) | 0 (0%) | 1.64 | ||
| State | Chamber | Size | Democrats | Republicans | Other | ENPP | Graph |
| Virginia | Lower | 99 | 39 (39%) | 58 (59%) | 2 (2%) | 2.00 | |
| Upper | 40 | 22 (55%) | 18 (45%) | 0 (0%) | 1.98 | ||
| Washington | Lower | 98 | 56 (57%) | 42 (43%) | 0 (0%) | 1.96 | |
| Upper | 49 | 27 (55%) | 22 (45%) | 0 (0%) | 1.98 | ||
| West Virginia | Lower | 100 | 65 (65%) | 35 (35%) | 0 (0%) | 1.83 | |
| Upper | 34 | 28 (82%) | 6 (18%) | 0 (0%) | 1.41 | ||
| Wisconsin | Lower | 96 | 39 (41%) | 57 (59%) | 0 (0%) | 1.93 | |
| Upper | 33 | 14 (42%) | 19 (58%) | 0 (0%) | 1.96 | ||
| Wyoming | Lower | 60 | 10 (17%) | 50 (83%) | 0 (0%) | 1.38 | |
| Upper | 30 | 4 (13%) | 26 (87%) | 0 (0%) | 1.30 | ||
Hi. My name is Adam Brown. How to contact me. I work at BYU, where I teach political science courses and do research. I got my PhD at the University of California, San Diego (UCSD). All content and code ©2005-2013 Adam R Brown unless noted. Do not republish any material from this site anywhere else without permission. Featuring glorious hand-coded PHP and valid XHTML/CSS. This page last updated February 25th, 2011.. Want more scripture power?