Coblentz is a surname. Notable people with the surname include:
Clara Rankin Coblentz (1863–1933), American social reformer Laban Coblentz (b. 1961), American writer and communications specialist William Coblentz (1873–1962), American scientist William Coblentz (1922–2010), California attorney and power broker Catherine Cate Coblentz, American writer of children's books Stanton A. Coblentz, American author and poet
See also Koblenz, a town in Rhineland-Palatinate, Germany Koblenz, Switzerland, a municipality in Canton Aargau Coblentz (lunar crater), crater on the Moon Coblentz (Martian crater), crater on Mars