Jean Roemer (born in England about 1815; died in Lenox, Massachusetts, 31 August 1892) was a Dutch soldier and a United States professor of French language and literature at the City College of New York.

His early education was conducted under the guardianship of William I, king of the Netherlands, and Frederica Louisa, Princess of Orange, and wife of Charles George Augustus, heir-apparent of the crown of Brunswick.

At the close of the war he visited the great military establishments of France, Prussia, and Austria, and completed his studies in Lombardy under the guidance and auspices of Field-Marshal Count Radetzky.

Some time after the death of William I, whose successor on the throne appears to have been influenced by a different spirit from that of his father concerning Roemer, the pretensions of the latter began to take a definite form, setting forth claims to titles and estates, the right to which was denied him on special grounds, which ever since have been maintained against him.

Strong efforts made in his behalf did not avail, and even at the congress of German sovereigns, held in Frankfurt in 1863, a well-supported attempt at compromise and conciliation remained without result.