| Election Name: | 2017 Carmarthenshire County Council election |
| Flag Image: | Arms of Carmarthenshire County Council.svg |
| Type: | Parliamentary |
| Ongoing: | no |
| Party Colour: | yes |
| Previous Election: | 2012 Carmarthenshire County Council election |
| Previous Year: | 2012 |
| Seats1: | 36 |
| Next Year: | 2022 |
| Majority Seats: | 37 |
| Election Date: | 4 May 2017 |
| Image1: | File:Emlyn Dole.jpg |
| Leader1: | Emlyn Dole |
| Party1: | Plaid Cymru |
| Leaders Seat1: | Llannon |
| Last Election1: | 28 seats, 37.8% |
| Party3: | Independent politician |
| Country: | Wales |
| Seat Change1: | 8 |
| Popular Vote1: | 31,215 |
| Percentage1: | 38.5% |
| Swing1: | 2.5% |
| Leader2: | Jeff Edmunds |
| Party2: | Welsh Labour |
| Leaders Seat2: | Bigyn |
| Last Election2: | 23 seats, 31.1% |
| Seats2: | 22 |
| Seat Change2: | 1 |
| Popular Vote2: | 24,358 |
| Percentage2: | 30.0% |
| Swing2: | 6.8% |
| Image3: | Ind |
| Seats For Election: | All 74 seats to Carmarthenshire County Council |
| Seats3: | 16 |
| Seat Change3: | 7 |
| Popular Vote3: | 18,313 |
| Percentage3: | 12.6% |
| Swing3: | 21.3% |
| Last Election3: | 23 seats, 29.7% |
| Council control | |
| Posttitle: | Council control after election |
| Before Election: | Plaid Cymru and Independent coalition |
| After Election: | Plaid Cymru and Independent coalition |
The sixth election to Carmarthenshire County Council was held on 4 May 2017 as part of wider local elections across Wales. The election was preceded by the 2012 election.[1] It will be followed by the 2022 election
Plaid Cymru narrowly missed out in forming the first majority administration in Carmarthenshire Council's history, despite gaining eight seats in the election. The Labour Party maintained its position from the 2012-2017 term, with the Independents losing many seats in the rural areas of Carmarthenshire to Plaid Cymru. Four candidates (from the seventy four seats) were elected unopposed.
A Plaid Cymru-Independent coalition was formed after the election, with Emlyn Dole remaining as the Leader of Council.[2]
No Overall Control Retained
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Plaid Cymru had gained Cilycwm at a by-election following the death of the previous Independent member. However, the party did not field a candidate resulting in the seat being captured by an Independent, who had finished second at the by-election.
Plaid Cymru had won the seat from the Independents at a by-election.
A by-election was held in Saron on 19 July 2018 following the death of Plaid Cymru councillor Alun Davies.[3] The seat was won by Plaid Cymru candidate Karen Davies.