Okaloosa County - Connecting Communities since 1915. Okaloosa became the 52nd county in Florida on September 7, 1915, and was created from parts of Santa Rosa and Walton Counties. The purpose of Okaloosa County Government is to be responsive to citizens in providing an appropriate level of accessible services on a cost effective basis. Critical County values include the following: continual improvement of infrastructure; health, safety, and well-being of the citizens; preservation of natural resources; responsible economic development; leadership; and stewardship.