List of settlements in Anglesey by population
This is a guide to the size of settlements in Anglesey based on 2021 census data. The entire population of Anglesey is 68,878.
| Rank | Settlement | Population |
| 1 | Holyhead | 11,760 |
| 2 | Llangefni | 5,261 |
| 3 | Amlwch | 3,147 |
| 4 | Menai Bridge | 3,046 |
| 5 | Llanfairpwllgwyngyll | 2,907 |
| 6 | Benllech | 2,072 |
| 7 | Valley | 2,005 |
| 8 | Gaerwen | 1,279 |