| Election Name: | 2005 Buckinghamshire County Council election |
| Country: | Buckinghamshire |
| Type: | Parliamentary |
| Ongoing: | no |
| Party Colour: | yes |
| Previous Election: | 2001 Buckinghamshire County Council election |
| Previous Year: | 2001 |
| Next Election: | 2009 Buckinghamshire County Council election |
| Next Year: | 2009 |
| Seats For Election: | All 57 seats to Buckinghamshire County Council |
| Majority Seats: | 29 |
| Election Date: | 5 May 2005 |
| Party1: | Conservative Party (UK) |
| Seats Before1: | 40 |
| Seats1: | 44 |
| Seat Change1: | 4 |
| Popular Vote1: | 146,980 |
| Percentage1: | 49.67% |
| Party2: | Liberal Democrats (UK) |
| Seats Before2: | 9 |
| Seats2: | 11 |
| Seat Change2: | 2 |
| Popular Vote2: | 97,289 |
| Percentage2: | 32.88% |
| Party3: | Labour Party (UK) |
| Seats Before3: | 5 |
| Seats3: | 2 |
| Seat Change3: | 3 |
| Popular Vote3: | 47,072 |
| Percentage3: | 15.91% |
| Map Size: | 300px |
| Council control | |
| Posttitle: | Council control after election |
| Before Election: | Conservative |
| After Election: | Conservative |
Elections to Buckinghamshire County Council were held on 5 May 2005, alongside the 2005 UK General Election and other local elections in England and Northern Ireland. The entire council was up for election, with each successful candidate serving a four-year term of office, expiring in 2009.
The Conservative Party remained in overall control of the council, winning 44 out of 57 seats. 11 of the remaining seats were won by the Liberal Democrats, whilst the remaining 2 were won by Labour.
The overall turnout was 65.4% with a total of 295,905 valid votes cast. A total of 2,397 ballots were rejected.
Following the last election in 2001 the composition of the council was:
| 40 | 9 | 5 | |
| Conservatives | Liberal Democrats | Labour |
After the election, the composition of the council was:
| 44 | 11 | 2 | |
| Conservatives | Liberal Democrats | Labour |
All results by ward are listed below. The turnout numbers recorded is the valid voter turnout, not the total number of ballots cast including those that were spoiled.