奥札克县（Ozark County, Missouri）是美国密苏里州南部的一个县。面积1,956平方公里。根据美国2000年人口普查，共有人口9，542。县治盖恩斯维尔 (Gainesville)。

成立于1841年 (1843至1845年曾易名第开特县以纪念1812年战争英雄斯提芬·第开特)。县名来自奥札克高原。

Ozark County is a county located in the southern portion of the U.S. state of Missouri. As of the 2010 census, the population was 9,723. The largest city and county seat is Gainesville. The county was organized as Ozark County, named after the Ozark Mountains, on January 29, 1841. It was renamed Decatur County, after Commodore Stephen Decatur, from 1843 to 1845, after which the name Ozark County was restored.