Before (end of 1998) (83 seats, Elections Centre)
Plaid Cymru - The Party of Wales 45 · Other 26 · Labour 9 · Liberal Democrats 3 · Conservative 0
After (end of 1999) (83 seats, Elections Centre)
Plaid Cymru - The Party of Wales 44 · Other 21 · Labour 12 · Liberal Democrats 6 · Conservative 0
Ward results
Aberdaron1 seat · turnout 68.2%
| W Roberts | PC | 261 ✓ |
| W Williams | Independent | 167 |
| R Jones | Independent | 125 |
Abersoch1 seat
| R. Williams | PC | 0 ✓ |
Barmouth1 seat
| T. Roberts | Labour | 0 ✓ |
Bontnewydd1 seat
| D. Iwan | PC | 0 ✓ |
Botwnnog1 seat
| E. Griffith | Independent | 0 ✓ |
Bowydd & Rhiw1 seat · turnout 62.6%
| E Williams | Labour | 479 ✓ |
| G. Roberts | PC | 378 |
Clynnog1 seat
| O. Williams | Independent | 0 ✓ |
Conglywal & Maenofferen2 seats · turnout 56.0%
| A. Jones | PC | 798 ✓ |
| O. Edwards | Labour | 589 ✓ |
| A. Williams | PC | 537 |
Corris/Mawddwy1 seat
| I. Jones | Independent | 0 ✓ |
Cynfal & Teigl1 seat
| L. Jones | PC | 0 ✓ |
Deiniol1 seat · turnout 25.0%
| Joyce A. | Liberal Democrats | 105 ✓ |
| D. Jones | Labour | 88 |
| James Williams | PC | 72 |
| A Plows | Green | 22 |
Dolbenmaen/Beddgelert1 seat
| D. Thomas | PC | 0 ✓ |
| Siencyn D. | PC | 0 |
| W. Meredith | Liberal Democrats | 0 |
| P. Jenkins | PC | 0 |
| Siencyn D. | PC | 0 ✓ |
| P. Jenkins | PC | 0 ✓ |
| W. Meredith | Liberal Democrats | 0 ✓ |
Dyffryn Ardudwy1 seat
| E. Pugh | Independent | 0 ✓ |
Efail-newydd/Buan1 seat
| William Tyssul Evans | PC | 0 ✓ |
Garth1 seat · turnout 41.8%
| J. Meredith | PC | 287 ✓ |
| I Albin | Liberal Democrats | 145 |
Gerlan1 seat · turnout 61.3%
| A Rowlands | PC | 412 ✓ |
| J. Masters | Labour | 181 |
Glyder1 seat · turnout 58.8%
| M. Williams | Independent | 279 ✓ |
| D. Davies | PC | 269 |
| G Buckley-Jones | Labour | 203 |
| Ap Rheinallt M | Green | 78 |
Llanaelhaearn/Pistyll1 seat
| W. Evans | PC | 0 ✓ |
Llanarmon/Llanystumdwy1 seat
| M. Griffith | PC | 0 ✓ |
Llanbedrog1 seat
| W. Jones | PC | 0 ✓ |
Llanberis1 seat · turnout 65.0%
| T. Edwards | Independent | 823 ✓ |
| A Williams | Liberal Democrats | 187 |
Llandderfel1 seat
| E. Edwards | PC | 0 ✓ |
Llandwrog2 seats · turnout 58.4%
| Ed Jones | Independent | 772 ✓ |
| M Owen | PC | 628 ✓ |
| Ifor Glyn Lloyd | Independent | 504 |
| C. Davies | PC | 423 |
Llandygai2 seats
| G. Griffith | Labour | 0 ✓ |
| D. Owen | PC | 0 ✓ |
Llangelynin/Bryncrug1 seat
| R. Lewis | Independent | 0 ✓ |
Llanllechid/Aber1 seat · turnout 58.5%
| J. Jones | Liberal Democrats | 397 ✓ |
| R Whitebeam | Green | 100 |
Llanllyfni1 seat
| O. Huws | PC | 0 ✓ |
Llanuwchllyn1 seat
| D. Roberts | PC | 0 ✓ |
Llanwnda1 seat · turnout 65.3%
| Gavin Andrew Owen | PC | 813 ✓ |
| J. Nicholson | Independent | 151 |
Marchog2 seats · turnout 28.9%
| K. Greenly-Jones | Labour | 483 ✓ |
| D Hainge | Labour | 392 ✓ |
| L. Davies | PC | 183 |
Menai (Bangor)2 seats · turnout 30.4%
| J. Marshall | Liberal Democrats | 541 ✓ |
| K. Thomas | Liberal Democrats | 328 ✓ |
| G. Roberts | PC | 276 |
| J Killock | Green | 140 |
Menai (Caernarfon)2 seats · turnout 56.8%
| R. Jones | PC | 716 ✓ |
| I. Thomas | PC | 557 ✓ |
| M. Williams | Independent | 472 |
| R Jones | Independent | 314 |
Nefyn2 seats · turnout 51.2%
| R Trenholme | Independent | 1,139 ✓ |
| J. Griffiths | Independent | 667 ✓ |
| Gavin Hughes | Independent | 366 |
Peblig1 seat · turnout 54.4%
| W. Owen | PC | 440 ✓ |
| A Bohana | Labour | 263 |
| A Williams | Independent | 138 |
Penisa’r-waun1 seat
| P. Larsen | PC | 0 ✓ |
Penrhyndeudraeth2 seats
| T. Morris | Independent | 0 ✓ |
| P. Gaffey | PC | 0 ✓ |
Pentir2 seats · turnout 44.7%
| D. Llewelyn | PC | 598 ✓ |
| James Williams | PC | 542 ✓ |
| D. Bulled | Labour | 406 |
Porthmadog - Dwyrain1 seat · turnout 63.9%
| I Roberts | Independent | 291 ✓ |
| O. Gwynfor | PC | 242 |
Porthmadog - Gorllewin1 seat · turnout 63.4%
| M Clishem | Independent | 257 ✓ |
| G Murray | PC | 140 |
Porthmadog-Gest1 seat · turnout 66.6%
| Thomas Maldwyn Benjamin Lewis | PC | 329 ✓ |
| G Dickinson | Independent | 205 |
Porthmadog-Tremadog1 seat
| R. Hughes | Independent | 0 ✓ |
Pwllheli - De1 seat
| A. Williams | PC | 0 ✓ |
Pwllheli - Gogledd1 seat · turnout 52.9%
| M Owen | PC | 633 ✓ |
| M Parry | Independent | 253 |
Pwllheli North (Gogledd)1 seat · turnout 54.1%
| M. Owen | Plaid Cymru - The Party of Wales | 633 ✓ |
| M. Parry | Independent | 252 |
Pwllheli South (De)1 seat
| A. Williams | Plaid Cymru - The Party of Wales | 0 ✓ |
Rachub1 seat
| Owen Jones | Labour | 0 ✓ |
Seiont2 seats · turnout 41.1%
| R Anderson | Independent | 758 ✓ |
| T. Thomas | Labour | 642 ✓ |
| Roberts R. | PC | 572 |
Talysarn1 seat · turnout 56.4%
| T. Jones | PC | 279 ✓ |
| R Humphries | Independent | 275 |
Trawsfynydd1 seat · turnout 73.3%
| T Ellis | Independent | 341 ✓ |
| Williams I. | PC | 293 |
| D Cartwright | Independent | 252 |
Tywyn2 seats · turnout 47.8%
| A. Lloyd-Jones | Independent | 1,115 ✓ |
| N. Huxley | PC | 1,050 ✓ |
| I Moody | Labour | 369 |
Y Felinheli1 seat · turnout 56.7%
| R. Evans | Labour | 400 ✓ |
| L Griffith | PC | 282 |
| W. Jones | Independent | 221 |
