Gelzer

Gelzer may refer to:


 * Heinrich Gelzer (1847–1906), German classical scholar and writer on Armenian mythology
 * Jay Gelzer (1889–1964), American writer
 * Johann Heinrich Gelzer (1813–1889), Swiss historian and diplomat, father of Heinrich Gelzer
 * Matthias Gelzer (1886–1974), a Swiss-German classical historian, known for his studies of the Roman Republic