| Coat of arms of Tonga Sila ʻo Tonga | |
|---|---|
 | |
| Armiger | Tupou VI, King of Tonga |
| Adopted | 4 November 1875 |
| Crest | the Royal Crown of Tonga within an olive wreath. |
| Shield | Quarterly; first, Or, three mullets of six points argent; second, Gules, the Royal Crown of Tonga proper; third, Azure a dove volant argent holding an olive branch vert; fourth Or, three swords in fret argent; overall, a mullet of six points argent charged with a cross couped gules. |
| Supporters | Flags of Tonga |
| Motto | Ko e ʻOtua mo Tonga ko hoku Tofiʻa "God and Tonga are my inheritance" |
The coat of arms or national seal of Tonga (ko e Sila ʻo Tonga) was designed in 1875 with the creation of the constitution.