During 2004–2006 insects were collected on or adjacent to Plummers Island, Montgomery County, Maryland by a number of techniques. Most neuropteroids were attracted to an ultraviolet light trap, but some were taken in Malaise traps operated during the season in 2005 and early 2006. Sixteen species of neuropteroids were identified from this material; they belong to 6 families and 14 genera. Although the samples included most of the megalopteran genera and species that are known from the region, the Neu-roptera were poorly represented. Five families almost assuredly present on the Island were not found. Most of the documented species are rather widely distributed over North America and none is considered endangered.