Theodore Lyman
Theodore Lyman may refer to:
- Theodore B. Lyman (1815–1893), American bishop
 - Theodore Lyman I (1753–1839), American merchant and shipbuilder
 - Theodore Lyman II (1792–1849), American philanthropist, politician, and author
 - Theodore Lyman III (1833–1897), American natural scientist, military staff officer, and politician
 - Theodore Lyman IV (1874–1954), American physicist