United States state legislatures' partisan trend

This chart shows the trends in the partisan composition of the various state legislatures in the United States. In most cases the data point for each year is July 1, a time when few elections are scheduled. Most states hold legislative elections in the even numbered years, so the data points below are near the end of the term for most states. However, 2018 data is for the beginning of the year. Nebraska is not included in the national summaries below. Vacancies are not listed.

National summary 2022 2020 2018 2013 2010 2008 2006 2004 Lower houses R 31-18R 28-20 R 31-18 R 29-18, 1 tie D 33–16 D 30–19 R 25–23, 1 tie R 26–23 Upper houses R 31-18R 31-18 R 36-14 R 29-18, 1 Coal. D 28–20, 1 Coal. D 28–20, 1 Coal. 24–24, 1 tie R 27–21, 1 tie Both houses controlled by one party R 30-17, 2 splitR 28-19, 2 split R 32-14, 4 split R 26-15, 8 split D 27–14, 8 split D 23–13, 13 split R 20–19, 10 split R 21–17, 11 split Governor and both houses controlled by one party R 23-14, 12 dividedR 21-15, 14 divided R 26-7, 17 divided R 24-13, 13 divided D 16–9, 24 divided D 14–9, 26 divided R 12–8, 29 divided R 12–8, 29 divided State House 2022 2020 2018 2013 2010 2008 2006 2004 Alabama House R 75-28R 75-28 R 70-33 R 66–39 D 60–45 D 62–43 D 63–42 D 64-41 SenateR 27-8R 27-8 R 26-7, 1 Ind. R 22–12, 1 Ind. D 21–13, 1 Ind. D 22–13 D 25–10 D 25-10 Alaska House Coal. 21-19Coal. 23-17 D 22–18 R 24–16 R 22–18 R 23–17 R 26–14 R 27-13 Senate Coal. 14-6R 13-7 R 14-6 R 13-7 Coal. 16–4 Coal. 15–5 R 12–8 R 12-8 Arizona House R 31-29R 31-29 R 35-25 R 40–20 R 36–24 R 33–27 R 38–22 R 39-20, 1 Ind. Senate R 26-7R 17-13 R 17-13 R 21–9 R 18–12 R 17–13 R 18–12 R 17-13 Arkansas House R 78-22R 76-25 R 75-24 D 55–44 D 72–28 D 75-25 D 72-28 D 70-30 Senate R 26-8R 26-9 R 25-9 D 20–15 D 27–8 D 27-8 D 27-8 D 27-8 California Assembly D 56-19D 61-17, 1 Ind. D 53-25 D 52–28 D 50–29, 1 Ind. D 48-32 D 48-32 D 48-32 Senate D 31-9D 29-11 D 27-13 D 25–15 D 26–14 D 25-15 D 25-15 D 25-15 Colorado House D 41-24D 41-24 D 37-27 R 33-32 D 38–27 D 40-25 D 35-30 R 37-28 Senate D 20-15D 19-16 R 18-17 D 20–15 D 20–15 D 20-15 D 18-17 R 18-17 Connecticut House D 95-53D 91-60 D 79-72 D 100-51 D 114–37 D 107-44 D 99-52 D 95-56 Senate D 23-13D 22-14 Tied D 18-18 D 23-13 D 24–12 D 23-13 D 24-12 D 21-15 Delaware House D 26-15D 26-15 D 25-16 D 26-15 D 24–16 R 22-19 R 26-15 R 29-12 Senate D 14-7D 12-9 D 11-10 D 14-7 D 15–6 D 13-8 D 13-8 D 13-8 Florida House R 78-40R 72-46 R 76-40 R 81-39 R 76–44 R 78-42 R 85-35 R 81-39 Senate R 24-15R 23-17 R 24-15 R 28-12 R 26–14 R 26-14 R 26-14 R 26-14 Georgia House R 103-77R 105-75 R 116-62 R 113-66, 1 Ind. R 105–74, 1 Ind. R 107-73 R 100-79, 1 Ind. D 107-72, 1 Ind. Senate R 34-22R 35-21 R 36-17 R 36-20 R 34–22 R 34-22 R 34-22 R 30-26 Hawaii House D 47-4D 46-5 D 45-5 D 43-8 D 45–6 D 44-7 D 41-10 D 36-15 Senate D 24-1D 24-1 D 25-0 D 24-1 D 23–2 D 21-4 D 20-5 D 20-5 Idaho House R 58-12R 56-14 R 59-11 R 57-13 R 52–18 R 51-19 R 57-13 R 54-16 Senate R 28-6R 28-7 R 29-6 R 28–7 R 28–7 R 28-7 R 28-7 R 28-7 Illinois House D 72-45D 73-44 D 67-51 D 64-54 D 70–48 D 67-51 D 65-53 D 66-52 Senate D 41-18D 40-19 D 37-22 D 35-24 D 37–22 D 37-22 D 31-27 1 Ind. D 32-26, 1 Ind. Indiana House R 71-29R 66-33 R 70-30 R 59-40 D 52–47, 1 Ind. D 51-49 R 52-48 D 51-49 Senate R 38-11R 40-10 R 41-9 R 37-13 R 33–17 R 33-17 R 33-17 R 32-18 Iowa House R 60-40R 53-47 R 59-41 R 60-40 D 56–44 D 53-47 R 51-49 R 54-46 Senate R 31-18R 32-18 R 28-20, 1 Ind. D 26-24 D 31–19 D 30-20 25-25 R 29-21 Kansas House R 85-39R 84-41 R 85-40 R 92-33 R 77–48 R 78-47 R 83-42 R 80-45 Senate R 29-11R 29-11 R 31-9 R 32-8 R 31–9 R 30-10 R 30-10 R 30-10 Kentucky House R 75-25R 62-38 R 64-36 D 58-42 D 65–35 D 64-36 D 56-44 D 64-36 Senate R 30-8R 28-10 R 27-11 R 22–15, 1 Ind. R 22–15, 1 Ind. R 21-16, 1 Ind. R 21-16, 1 Ind. R 22-16 Louisiana House R 68-33R 68-35, 2 Ind. R 60-41, 3 Ind. R 52-49, 4 Ind. D 52–50, 3 Ind. D 53-50, 2 Ind. D 67-37, 1 Ind. D 67-37, 1 Ind. Senate R 26-12R 27-12 R 25-14 R 20-19 D 22–15, 2 Ind. D 23-16 D 24-15 D 25-14 Maine House D 79-66, 5 Ind.D 87-56, 6 Ind. D 80-70 R 78-72, 1 Ind. D 95–55, 1 Ind. D 90-59, 2 Ind. 73-73, 4 Ind, 1 Green D 82-66, 4 Ind, 1 Green Senate D 22-13D 21-14 R 18-17 R 20-14 D 20–15 D 18-17 D 19-16 D 18-17 Maryland House D 98-42D 99-42 D 91-49 D 98-43 D 104–36, 1 Ind. D 104-37 D 98-43 D 98-43 Senate D 32-15D 32-14 D 33-14 D 35-12 D 33–14 D 33-14 D 33-14 D 33-14 Massachusetts House D 129-29D 127-31, 1 Ind. D 125-34, 1 Ind. D 128-31 D 143–16, 1 Ind. D 141-19 D 139-21 D 136-23, 1 Ind. Senate D 36-3D 36-4 D 33-6 D 36-4 D 35–5 D 35-5 D 34-6 D 33-7 Michigan House R 56-52R 58-51 R 63-47 R 63-47 D 67–43 D 58-52 R 58-49 R 63-46 Senate R 22-16R 22-16 R 27-11 R 26-12 R 21–17 R 21-17 R 22-16 R 22-16 Minnesota House D 70-64D 75-55, 4 NP R 76-57 R 72-62 DFL 87–47 DFL 85-48, 1 Ind. R 68-66 R 81-53 Senate R 34-31, 2 Ind.R 35-32 R 34-33 R 37-30 DFL 46–21 DFL 45-22 DFL 37-29, 1 Ind. D 35-31, 1 Ind. Mississippi House R 75-46R 73-45, 1 Ind. R 73-47 D 72-50 D 74–48 D 75-47 D 75-47 D 76-46 Senate R 36-15R 34-16 R 31-19 R 27-25 D 27–25 D 27-25 D 28-24 D 29-23 Missouri House R 112-49R 113-48 R 112-45 R 106-57 R 89–74 R 92-71 R 96-66 R 90-73 Senate R 24-10R 23-8 R 24-9 R 26-8 R 23–11 R 20-14 R 23-11 R 20-14 Montana House R 67-33R 58-42 R 59-41 R 68-32 D 50–50 R 50-49, 1 Const. 50-50 R 53-47 Senate R 31-19R 30-20 R 32-18 R 28-22 R 27–23 D 26-24 D 26-24 R 29-21 Nebraska Unicameral and non–partisan Senate with 49 members Nevada Assembly D 26-16D 29-13 D 27-14 D 26-16 D 28–14 D 27-15 D 26-16 D 23-19 Senate D 11-9D 13-8 D 11-9 D 11-10 D 12–9 R 11-10 R 12-9 R 13-8 New Hampshire House R 207-188D 231-158, 1 Ind. R 219-174, 3 Lib. R 298-102 D 225–175 D 239-161 R 247-152 R 279-121 Senate R 14-10D 14-10 R 14-10 R 19-5 D 14–10 D 14-10 R 16-8 R 18-6 New Jersey Assembly D 46-34D 52-28 D 52-28 D 47–33 D 47–33 D 48-32 D 49-31 D 47-33 Senate D 24-16D 25-15 D 24-16 D 24–16 D 23–17 D 23-17 D 22-18 D 22-18 New Mexico House D 44-24D 45-24 D 38-32 D 37-33 D 45–25 D 42-28 D 42-28 D 43-27 Senate D 26-15, 1 Ind.D 26-16 D 26-16 D 27-15 D 27–15 D 24-18 D 24-18 D 24-18 New York Assembly D 104-43, 1 Ind.D 103-42, 1 Ind. D 106-41, 1 IP D 100-48, 2 Vac. D 108–42 D 108-42 D 105-45 D 102-47 Senate D 43-20D 40-20 R 32-31 R 32-30 D 32–30 R 32-30 R 35-27 R 37-24 North Carolina House R 69-51R 64-55 R 75-45 R 67-52 D 68–52 D 68-52 D 63-57 R 61-59 Senate R 28-22R 28-21 R 35-15 R 31-19 D 30–20 D 31-19 D 29-21 D 27-23 North Dakota House R 80-14R 79-15 R 81-13 R 69-25 R 58–36 R 61-33 R 67-27 R 66-28 Senate R 40-7R 37-10 R 38-9 R 35-12 R 26–21 R 26-21 R 32-15 R 31-16 Ohio House R 64-34R 61-38 R 65-33 R 59-40 D 53–46 R 53-46 R 60-38, 1 Vac. R 62-37 Senate R 25-8R 24-9 R 23-9 R 23-10 R 21–12 R 21-12 R 22-11 R 22-11 Oklahoma House R 82-18R 77-23 R 71-28 R 70-31 R 62–39 R 57-44 R 57-44 D 53-48 Senate R 39-9R 38-9 R 39-7 R 32-16 R 26–22 D 24-24 D 25-22 D 28-20 Oregon House D 37-22D 38-22 D 35-24 30-30 D 36–24 D 31-29 R 33-27 R 35-25 Senate D 18-11, 1 Ind.D 18-12 D 17-13 D 16-14 D 18–12 D 18-11, 1 Ind. D 18-12 15-15 Pennsylvania House R 112-88R 109-93 R 121-80 R 112-91 D 104–99 D 102-101 R 109-93 R 109-94 Senate R 28-21, 1 Ind.R 28-21, 1 Ind. R 34-16 R 30–20 R 30–20 R 29-21 R 29-20 R 29-21 Rhode Island House D 65-10D 66-8, 1 Ind. D 64-11 D 65-10 D 69–6 D 60-15 D 60-15 D 63-11, 1 Ind. Senate D 33-5D 33-5 D 33-5 D 29-8 1 Ind. D 33–4, 1 Ind. D 33-5 D 33-5 D 32-6 South Carolina House R 79-43R 78-45 R 78-43 R 75-48 1 Ind. R 71–53 R 73-51 R 73-51 R 73-51 Senate R 29-16R 27-19 R 28-18 R 27-19 R 27–19 R 26-20 R 26-20 R 25-21 South Dakota House R 62-8R 59-11 R 59-10 R 50-19 1 Ind. R 46–24 R 50-20 R 51-19 R 49-21 Senate R 32-3R 30-5 R 29-6 R 30-5 R 20–14, 1 Ind. R 20-15 R 25-10 R 26-9 Tennessee House R 73-26R 73-26 R 74-25 R 64-33 1 Ind. R 50–48, 1 Ind. D 53-46 D 53-46 D 54-45 Senate R 27-5R 28-5 R 25-5 R 19-13; 1 Vac. R 19–14 R 16-16, 1 Ind. R 17-15 D 18-15 Texas House R 85-64R 83-67 R 95-55 R 101-49 R 76–74 R 79-71 R 86-64 R 88-62 Senate R 18-13R 19-12 R 20-11 R 19–12 R 19–12 R 20-11 R 19-12 R 19-12 Utah House R 58-17R 59-16 R 62-13 R 58-17 R 53–22 R 55-20 R 56-19 R 56-19 Senate R 23-6R 23-6 R 24-5 R 22-7 R 21–8 R 21-8 R 21-8 R 22-7 Vermont House D 95-43, 7 Prog., 5 Ind.D 95-44, 7 Prog, 5 Ind. D 83-53, 7 Prog, 7 Ind. D 95–48, 4 Prog, 3 Ind. D 95–48, 5 Prog, 2 Ind. D 93-49, 6 Prog. 2 Ind. D 83-60, 6 Prog, 1 Ind. R 73-71, 4 Prog, 2 Ind. Senate D 21-7, 2 Prog.D 22-6, 2 Prog. D 21-7, 2 Prog. D 22–8, 1 Prog. D 22–7, 1 Prog. D 23-7 D 21-9 D 19-11 Virginia House R 52-48D 55-44 R 51-49 R 59–39, 2 Ind. R 59–39, 2 Ind. R 53-45, 2 Ind. R 56-40, 3 Ind. R 61-37, 2 Ind. Senate D 21-19D 21-19 R 21-19 D 22–18 D 22–18 D 21-19 R 23-17 R 24-16 Washington House D 57-41D 57-14 D 50-48 D 56-42 D 64–34 D 63-35 D 56-42 D 52-46 Senate D 29-20D 29-20 D 25-24 D 27-22 D 31–18 D 32-17 D 26-23 R 25-24 West Virginia House R 78-22R 58-41, 1 Ind. R 62-35, 1 Ind. D 65-35 D 79–21 D 72-28 D 68-32 D 69-31 Senate R 23-11R 20-14 R 22-12 D 28–6 D 28–6 D 23-11 D 21-13 D 24-10 Wisconsin Assembly R 61-38R 63-34 R 63-35 R 60-38 1 Ind. D 52–46, 1 Ind. R 52-47 R 59-39 R 59-40 Senate R 21-12R 18-13 R 19-13 R 19-14 D 18–15 D 18-15 R 19-14 R 18-15 Wyoming House R 51-7, 1 Lib., 1 Ind.R 50-9, 1 Ind. R 51-9 R 50-10 R 41–18 R 43-17 R 46-14 R 45-15 Senate R 28-2R 27-3 R 27-3 R 26-4 R 23–7 R 23-7 R 23-7 R 20-10

See also List of United States state legislatures Political party strength in U.S. states

References