| Election Name: | 2003 United States state legislative elections |
| Country: | United States |
| Type: | legislative |
| Ongoing: | no |
| Previous Election: | 2002 United States state legislative elections |
| Previous Year: | 2002 |
| Next Election: | 2004 United States state legislative elections |
| Next Year: | 2004 |
| Seats For Election: | 8 legislative chambers in 4 states |
| Election Date: | November 7, 2003 |
| Party1: | Republican Party (United States) |
| Party2: | Democratic Party (United States) |
| Map Size: | 320px |
| Map2 Image: | US2003statelowerhouses.svg |
| Map2 Size: | 320px |
| Map2 Caption: | Map of lower house elections: |
| 1Data1: | 53 |
| 2Data1: | 53 |
| 1Data2: | 43 |
| 2Data2: | 44 |
| 3Data2: | 1 |
| 1Blank: | Chambers before |
| 2Blank: | Chambers after |
| 3Blank: | Overall change |
The 2003 United States state legislative elections were held on November 7, 2003, alongside other elections. Elections were held for 8 legislative chambers.[1] Both chambers of the Northern Mariana Islands legislature was up.
Partisan change only occurred in one chamber, as Democrats won control of the New Jersey Senate, which was previously tied.[2] However, Democrats did maintain control of the Mississippi Legislature, the Louisiana Legislature, and the New Jersey General Assembly. Republicans maintained control of the Virginia legislature, bringing a post-Civil War low for the Democratic Party.[3]
Regularly-scheduled elections were held in 8 of the 99 state legislative chambers in the United States. Nationwide, regularly-scheduled elections were held for 578 of the 7,383 legislative seats. This table only covers regularly-scheduled elections; additional special elections took place concurrently with these regularly-scheduled elections.
| State | Upper House | Lower House | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Seats up | Total | % up | Term | Seats up | Total | % up | Term | ||
| Louisiana | 39 | 39 | 100 | 4 | 105 | 105 | 100 | 4 | |
| Mississippi | 52 | 52 | 100 | 4 | 122 | 122 | 100 | 4 | |
| New Jersey | 40 | 40 | 100 | 2/4 | 80 | 80 | 100 | 2 | |
| Virginia | 40 | 40 | 100 | 4 | 100 | 100 | 100 | 2 | |
| State | Previous UH | Result | Party control | ||||
|---|---|---|---|---|---|---|---|
| Louisiana | D 26-13 | D 24-15 | Democratic hold | ||||
| Mississippi | D 34-18 | D 34-18 | Democratic hold | ||||
| New Jersey | Split | 20-20 | D 22-18 | Democratic Takeover | |||
| Virginia | R 21-19 | R 24-16 | Republican hold |
| State | Previous LH | Result | Party control | ||||
|---|---|---|---|---|---|---|---|
| Louisiana | D 74-31 | D 66-37-2 | Democratic hold | ||||
| Mississippi | D 81-38-3 | D 76-46 | Democratic hold | ||||
| New Jersey | D 44-36 | D 47-33 | Democratic Hold | ||||
| Virginia | R 64-34-2 | R 61-37-2 | Republican Hold |