Ten new county records and significant extensions of known geographic ranges are reported for 10 taxa of fishes within 6 families (Atherinopsidae, Catostomidae, Centrarchidae, Cyprinidae, Fundulidae, and Percidae) from five rivers in Arkansas. Records are presented for the shoal chub (Macrhybopsis hyostoma), highfin carpsucker (Carpiodes velifer), golden redhorse (Moxostoma erythrurum), pealip redhorse (Moxostoma pisolabrum), northern starhead topminnow (Fundulus dispar), Mississippi silverside (Menidia audens), dollar sunfish (Lepomis marginatus), crystal darter (Crystallaria asprella), mud darter (Etheostoma asprigene), and river darter (Percina shumardi).