| State         | Membership | Parliament    | Membership status                         | Represented since | Members |
| Denmark       | Full       | The Folketing | Sovereign state                           | 1952              | 16      |
| Iceland       | Full       | Alþingi       | Sovereign state                           | 1952              | 7       |
| Norway        | Full       | The Storting  | Sovereign state                           | 1952              | 20      |
| Sweden        | Full       | The Riksdag   | Sovereign state                           | 1952              | 20      |
| Finland       | Full       | Eduskunta     | Sovereign state                           | 1955              | 18      |
| Greenland     | Associate  | Landsting     | Self-governing region of the Danish Realm | 1984              | 2       |
| Faroe Islands | Associate  | Løgting       | Self-governing region of the Danish Realm | 1970              | 2       |
| Åland Islands | Associate  | Lagting       | Self-governing region of Finland          | 1970              | 2       |
| Estonia       | Observers  |               |                                           |                   |         |
| Latvia        | Observers  |               |                                           |                   |         |
| Lithuania     | Observers  |               |                                           |                   |         |