| The Most Illustrious Order of the Royal House of Chakri เครื่องขัตติยราชอิสริยาภรณ์อันมีเกียรติคุณรุ่งเรืองยิ่งมหาจักรีบรมราชวงศ์ | |
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 Collar and Star of the Most Illustrious Order of the Royal House of Chakri | |
Awarded by .svg){kind=small} the King of Thailand | |
| Type | Dynastic order |
| Established | 1882 |
| Royal house | House of Chakri |
| Seat | 25 (except for foreigner) |
| Eligibility | Members of the Thai Royal Family and foreign heads of state |
| Criteria | At the monarch's pleasure |
| Status | Currently constituted |
| Founder | Chulalongkorn |
| Sovereign | Vajiralongkorn |
| Grades | Knight/Dame |
| Statistics | |
| First induction | 6 April 1882 |
| Last induction | 5 May 2019 |
| Total inductees | 232 |
| Precedence | |
| Next (higher) | Order of the Rajamitrabhorn |
| Next (lower) | Order of the Nine Gems |
_ribbon.svg){kind=small} Ribbon bar of the Royal House of Chakri | |
The Most Illustrious Order of the Royal House of Chakri (Thai: เครื่องขัตติยราชอิสริยาภรณ์อันมีเกียรติคุณรุ่งเรืองยิ่งมหาจักรีบรมราชวงศ์; RTGS: Khrueang Khattiyaratcha-itsariyaphon An Mi Kiattikhun Rung-rueang Ying Maha Chakkri Borommaratchawong) was founded in 1882 by King Chulalongkorn (Rama V) of the Kingdom of Siam (now Thailand) to commemorate the Bangkok Centennial. The order is awarded to members of the House of Chakri (the Thai royal family), foreign heads of state and members of other royal houses.
Members of the order are entitled to use the postnominals ม.จ.ก.