奥卡鲁沙县（Okaloosa County, Florida）是美国佛罗里达州西部的一个县，北临亚拉巴马州，南临墨西哥湾。面积2,802平方公里。根据美国2000年人口普查，共有人口170,498。县治克里斯由 (Crestview)，最大城市为华尔顿堡滩 (Fort Walton Beach)。

成立于1915年6月13日。县名是乔克托语，由oka (水)和lusa (黑)两词合成。

Okaloosa County is a county located in the northwestern portion of the U.S. state of Florida, extending from the Gulf of Mexico to the Alabama state line. As of the 2010 census, the population was 180,822. Its county seat is Crestview.

Okaloosa County is included in the Crestview-Fort Walton Beach-Destin, FL Metropolitan Statistical Area.