The following statistics are based on version 8.5 of the BioSystematic Database of World Diptera. For the Nearctic region this version contains a total of 26,793 species name records of which 21,356 (80%) represent valid species. 86% of the species are endemic to the Nearctic region.

For statistics on other biogeographic regions click on the following links:
All Biotic Regions
Afrotropical Region
Australasian/Oceanian Region
Neotropical Region
Oriental Region
Palaearctic Region

Source tables: valid species per family, valid species per year, name records per family, name records per year.