James Simms (1828 – 4 September 1915) was an English instrument maker.
The firm made instruments of various kinds, including notably astronomical instruments and telescopes.
For about ten years, until 1871, his partner in the firm was his cousin William Simms (1817 – 1907), who was the son of his uncle James, the brother of his father William.
After his death, he was succeeded in the firm by his sons, who were named William and James.
This English biographical article is a stub.