Bartholomew was born in Amsterdam, Holland between 1660 and 1665, the eldest son of Pierre and Jane Le Roux, who were of French Huguenot descent. The family emigrated to London, and the father became a naturalized English subject in 1681; the mother, in 1685/86.
Bartholomew evidently learned his trade from his father, who was a member of the Goldsmiths' Company of London. Young Le Roux emigrated to America some time prior to June 6, 1687, on which date he was made a freeman of the city of New York.
In 1689, at the outbreak of the rebellion led by Jacob Leisler, Le Roux was a member of the city militia company commanded by Capt. Gabriel Minvielle. He and his fellow soldiers supported Leisler by insisting that the whole company be on guard at the fort, in spite of regulations which permitted only half a company to be in arms at one time. Lieutenant-Governor Nicholson and Col. Nicholas Bayard, a member of the council, demanded an explanation for this action, and Le Roux, as spokesman for the company, declared that they feared an attack by Papists from Staten Island and Boston, and, as many of the soldiers already in the fort were Papists, they "thought themselves not secure to be so guarded". Le Roux disapproved of Leisler's subsequent political activities, however, for he seems to have taken no further part in the rebellion, and some years later when Governor Bellomont favored the Leisler faction and removed their opponents from office, Le Roux joined with Nicholas Bayard and several hundred other Protestants in an address of protest to William III.
As a silversmith he was a good craftsman and prospered, becoming well-known and trusted in the community. On December 30, 1693, he purchased a house and lot at the corner of Broadway and Morris Street, and when he died he owned "Goods Chattels & Creditts In diverse places within this province". He was elected to several city offices--constable in 1691, collector in 1699, assessor in 1707, and assistant alderman in 1702-1704 and 1708-1713. He was often asked to be a sponsor at baptisms, a witness or executor of wills, and to make inventories of estates.
He died in 1713, some time between July 10, when he made his will, and July 28, when the common council ordered the election of an assistant alderman "in the Room of Mr Bartholomew Le Roux deceased".
On December 14, 1688, Le Roux married Gertrude Van Rollegom. They had eleven children; the eldest son, Charles, became in after years the official silversmith of New York.
