Thomas Bonar (1820 - May 19, 1891) was a New York City engraver and lithographer active in the second half of the 19th century. Bonar was born in Edinburgh, Scotland. He is described as 'the handsomest man to be seen in New York,' notable for his exceptional height, long white hair, and erect posture (Brooklyn Daily Eagle, May 20, 1891). He emigrated to New York City around 1847, which also corresponds to the earliest records of his work. From 1860 to 1863 worked for the New York Heard, producing engravings and 'war maps' illustrating Civil War events. He later worked for the Telegraph and the Tribune. In 1850, his work is associated with the firm of 'Bonar and Cummings', who produced engravings for the Methodist Book Room and Methodist Magazine. He retired from the lithography business around 1886 to devote himself to home life, travel, and the New York Press Club, of which he was an honorary member. He was also an active supporter of the Temperance Movement. Bonar maintained offices at 87 Nassau Street, but lived in Brooklyn at 173 Taylor Street.