We surveyed moth populations in Congaree NP (Richland County, SC) between November 2009 and October 2010. We conducted primary sampling for 2 nights per month using ultraviolet bucket-traps and mercury-vapor lamps with sheets in accessible areas of the park. We also collected specimens near building lights throughout the study and conducted bait sampling during cold-weather months. We curated 10,950 specimens. Of these, we have identified 10,524 to species and 134 to genus, with 15 of those being as yet unnamed new species. There are 295 specimens that remain unidentified. Our survey yielded 1002 species in 547 genera and 49 families, raising the confirmed moth data from the park to 1005 species, 549 genera, and 49 families. Our data included 161 species previously unreported from SC. Of those, 55 species have not been reported to occur in the adjacent states of GA or NC. We recorded only 3 non-native species that collectively totaled 6 individuals.