Clarence Henry Geist | |
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| Born | January 10, 1866 LaPorte County, Indiana, U.S. |
| Died | June 12, 1938 (aged 72) Villanova, Pennsylvania, U.S. |
| Occupation(s) | Utilities executive, financier |
| Known for | Purchasing Mizner Development Corporation's assets in Boca Raton, Florida |
| Spouse | Florence Hewitt Geist |
Clarence Henry Geist (1866 – June 12, 1938) was an American financier who played an important role in the early history of Boca Raton, Florida.