| Lockhart-Ross baronets | |
| Creation Date: | 1672 |
| Status: | extinct |
| Extinction Date: | 1942 |
| Motto: | Spem successus alit, Success nourishes hope |
The Lockhart, later Lockhart-Ross Baronetcy, of Carstairs in the County of Lanark, was a title in the Baronetage of Nova Scotia.
It was created on 28 February 1672 for William Lockhart. The fourth Baronet used the surname Ross-Lockhart, which was also borne by the sixth, seventh, eighth and ninth Baronets. The sixth Baronet was an admiral in the Royal Navy and sat as Member of Parliament for Lanark and Lanarkshire. The seventh Baronet was Member of Parliament for Tain Burghs, Ross-shire and Linlithgow Burghs. The ninth Baronet was an inventor and commercial entrepreneur. The title became extinct on his death in 1942.