Watt was elected a Fellow of the Royal Society of Edinburgh, recognizing his scientific achievements and contributions to the advancement of knowledge.

Watt was elected a Fellow of the Royal Society of London, one of the most prestigious scientific societies in the world, further solidifying his reputation as a leading scientist and engineer.

The watt, the SI unit of power, was named in his honor, recognizing his pivotal role in the development of the steam engine and its impact on the Industrial Revolution. This is perhaps his most enduring legacy.

Numerous statues and memorials have been erected in Watt's honor, celebrating his life and achievements. These monuments can be found in cities and towns around the world, including London, Birmingham, and Greenock.

Watt's legacy continues to be celebrated through various institutions, awards, and scholarships named in his honor, promoting innovation and excellence in science and engineering.