| Election Name: | 2009 Devon County Council election |
| Country: | England |
| Flag Image: | Flag of Devon.svg |
| Type: | Parliamentary |
| Ongoing: | no |
| Party Colour: | yes |
| Previous Election: | 2005 Devon County Council election |
| Previous Year: | 2005 |
| Next Election: | 2013 Devon County Council election |
| Next Year: | 2013 |
| Seats For Election: | All 62 seats to Devon County Council |
| Majority Seats: | 32 |
| Election Date: | 7 May 2009 |
| Party1: | Conservative Party (UK) |
| Last Election1: | 23 seats, 37.7% |
| Seats1: | 41 |
| Seat Change1: | 18 |
| Popular Vote1: | 106,411 |
| Percentage1: | 41.9% |
| Swing1: | 4.2% |
| Party2: | Liberal Democrats (UK) |
| Last Election2: | 33 seats, 38.0% |
| Seats2: | 14 |
| Seat Change2: | 19 |
| Popular Vote2: | 75,815 |
| Percentage2: | 29.9% |
| Swing2: | 8.1% |
| Party3: | Labour Party (UK) |
| Last Election3: | 4 seats, 12.1% |
| Seats3: | 4 |
| Popular Vote3: | 15,339 |
| Percentage3: | 6.1% |
| Swing3: | 6.0% |
| Party4: | Independent (politician) |
| Last Election4: | 2 seats, 4.3% |
| Seats4: | 2 |
| Popular Vote4: | 11,768 |
| Percentage4: | 4.6% |
| Swing4: | 0.3% |
| Party5: | Green Party of England and Wales |
| Last Election5: | 0 seats, 2.5% |
| Seats5: | 1 |
| Seat Change5: | 1 |
| Popular Vote5: | 17,290 |
| Percentage5: | 6.8% |
| Swing5: | 4.3% |
| Map Size: | 400px |
| Council control | |
| Posttitle: | Council control after election |
| Before Election: | Liberal Democrat |
| After Election: | Conservative |
An election to Devon County Council took place on 7 May 2009 as part of the 2009 United Kingdom local elections. The elections had been delayed from 7 May, to coincide with elections to the European Parliament. 62 councillors were elected from various electoral divisions, which returned either one or two county councillors each by first-past-the-post voting for a four-year term of office. The electoral divisions were the same as those used at the previous election in 2005. No elections were held in Plymouth and Torbay, which are unitary authorities outside the area covered by the County Council.
All locally registered electors (British, Irish, Commonwealth and European Union citizens) who were aged 18 or over on Thursday 2 May 2009 were entitled to vote in the local elections. Those who were temporarily away from their ordinary address (for example, away working, on holiday, in student accommodation or in hospital) were also entitled to vote in the local elections,[1] although those who had moved abroad and registered as overseas electors cannot vote in the local elections. It is possible to register to vote at more than one address (such as a university student who had a term-time address and lives at home during holidays) at the discretion of the local Electoral Register Office, but it remains an offence to vote more than once in the same local government election.[2]
The election saw the Liberal Democrats lose control of the council to the Conservatives. The Liberal Democrats were reduced to the second largest party and hence the official opposition. Devon was one of 2 county councils controlled by the Liberal Democrats, the other being Somerset County Council, both were lost to the Conservative Party.