| 1911 | |
| 1912 | - New city jail built* |
| 1913 | - Seminole County carved from Orange County* - Orlando aviation pioneer Carl Kuhl becomes first Floridian to hold a pilot's license*** |
| 1914 | - Commission form of government begins* |
| 1915 | - Construction of 3,800 mile cross-Florida Dixie Highway begins*** |
| 1916 | |
| 1917 | - Post Office built on East Central Avenue* - Company "C" merged with the Thirty-first (Dixie) Division* - Dr. Phillips Theatre opens, October 17 (City of Orlando Historic Preservation Calendar) |
| 1918 | - Armistice Day — November 11* |
| 1919 | |
| 1920 | - Orlando Rotary Club organized* - City hall offices moved to Armory Building* - Lions Club organized (Closed in 1921, re-activated in 1922)* - Hand Tourist Camp opens in Orlando. 20 acres between East Central and East South streets*** |
References:
* Bacon, Eve. Orlando a Centennial History: Vol I. Chuluota, FL: The Mickler House, Publishers. 1975
** Bacon, Eve. Orlando a Centennial History: Vol II. Chuluota, FL: The Mickler House, Publishers. 1977
*** Orange County Regional History Center – Informational Display