According to the United States Census Bureau, Crab Orchard has a total area of , of which , or 0.66%, are water. The city is southwest of the Dix River, a northwest-flowing tributary of the Kentucky River.
According to the United States Census Bureau Crab Orchard has a total area of  of which  or 066% are water The city is southwest of the Dix River a northwest-flowing tributary of the Kentucky River