Listed by county are the currently known species of liverworts and hornworts collected in Nebraska. The list builds on the work of earlier collectors, especially that of Walter Kiener for the period 1936-1953. More recent collections include those by Locklear, Rolfsmeier, Steinauer, Sutherland, and Wikel. To date, hornworts and liverworts have been found in 67 of the state's 93 counties. The checklist provides county and collection information and brief notes on habitat preferences and diagnostic characters.