List of state leaders in the 20th century BC List of state leaders in the 20th century BC List of state leaders in the 20th century BC

| Type_ | Name_ | Title | Royal_house | From_ |
|---|---|---|---|---|
| Sovereign | Sláine mac Dela | High King | Fir Bolg | 1934 BC |
| Sovereign | Rudraige mac Dela | High King | Fir Bolg | 1933 BC |
| Sovereign | Gann mac Dela & Genann | High King | Fir Bolg | 1931 BC |
| Sovereign | Sengann mac Dela | High King | Fir Bolg | 1927 BC |
| Sovereign | Fiacha Cennfinnán | High King | Fir Bolg | 1922 BC |
| Sovereign | Rinnal | High King | Fir Bolg | 1917 BC |
| Sovereign | Fodbgen | High King | Fir Bolg | 1911 BC |
| Sovereign | Eochaid mac Eirc | High King | Fir Bolg | 1907 BC |