Tallmadge may refer to one of the following people:
- John Tallmadge, a nature writer from Cincinnati
- Benjamin Tallmadge (1754—1835), a congressman from New England and a Major in the American Revolution
- Nathaniel P. Tallmadge (1795—1864), a United States Senator from New York
- James Tallmadge (1778—1853), a United States Representative from New York
- Frederick A. Tallmadge (1792—1869), a United States Representative from New York
- Matthias Burnett Tallmadge (1774—1819), a judge in New York from 1805 until 1814
- Thomas E. Tallmadge; a well-known Prairie School architect from Chicago.
Tallmadge may refer to one of the following places:
- Tallmadge Township, Michigan
- Tallmadge, Ohio
Tallmadge may also refer to:
- Tallmadge Amendment