Warren County shi ne gundumar da ke gabashin gabashin jihar Missouri. A cikin ƙidayar shekarar 2010, yawan jama'a ya kai 32,513. Gundumar tana gefen arewacin Kogin Missouri. Warrenton ita ce wurin zama. An shirya gundumar a ranar 5 ga Janairu, 1833, kuma an kira shi ne don Janar Joseph Warren, wanda ya mutu a yakin Bunker Hill a lokacin yakin basasa na Amurka.Gundumar Warren na daga cikin St. Louis, MO-IL Metropolitan Statistical Area.
Gundumar Warren