| Honorific-Prefix: | The Right Honourable |
| The Lord Addington | |
| Office: | Member of the House of Lords Lord Temporal |
| Term Start1: | 15 June 1915 |
| Term End1: | 20 June 1966 Hereditary Peerage |
| Predecessor1: | The 2nd Lord Addington |
| Successor1: | The 4th Lord Addington |
| Birth Date: | 7 June 1883 |
Major John Gellibrand Hubbard, 3rd Baron Addington OBE TD, JP (7 June 1883 – 20 June 1966) was a British peer.
Hubbard was the eldest son of Egerton Hubbard, 2nd Baron Addington, and succeeded to the Barony on the death of his father in 1915 and took his seat in the House of Lords.
He was commissioned a volunteer officer as a second lieutenant in the 1st Bucks Volunteers on 4 October 1902.
| Crest: | In front of a fasces fessewise Proper an eagle's head as in the arms. |
| Escutcheon: | Vert a chevron engrailed plain cotised Argent between three eagles' heads erased of the second each gorged with a collar fleurettée Gules |
| Supporters: | On either side an eagle Argent wings addorsed gorged with a collar fleurettée Gules and pendent therefrom an escutcheon Ermine charged with a rose Gules |
| Motto: | Alta Petens (Latin for: Seeking Higher Things)[1] |