| Family | Common Name | Selected Genus and Species | Image |
| Anisopodidae | Wood gnats | Sylvicola fenestralis |  |
| Axymyiidae | Gnats | Axymyia furcata |  |
| Bibionidae | March flies | Bibio johannis |  |
| Blephariceridae | Net-winged midges | Blepharicera fasciata |  |
| Bolitophilidae | Fungus gnats | Bolitophila cinerea |  |
| Canthyloscelidae | Midges | Synneuron decipiens |  |
| Cecidomyiidae | Gall midges | Catocha americana |  |
| Ceratopogonidae | Biting midges | Culicoides sonorensis |  |
| Chaoboridae | Phantom midges | Chaoborus flavicans |  |
| Chironomidae | Non-biting midges | Chironomus plumosus |  |
| Corethrellidae | Frog-biting midges | Corethrella brakeleyi |  |
| Culicidae | Mosquitoes | Culiseta longiareolata |  |
| Cylindrotomidae | Long-bodied crane flies | Cylindrotoma distinctissima |  |
| Deuterophlebiidae | Mountain midges | Deuterophlebia mirabilis |  |
| Diadocidiidae | Woodland flies | Diadocidia borealis |  |
| Ditomyiidae | Fungus gnats | Symmerus annulatus |  |
| Dixidae | Meniscus midges | Dixa nebulosa |  |
| Hesperinidae | March flies | Hesperinus brevifrons |  |
| Keroplatidae | Fungus gnats | Platyura marginata |  |
| Limoniidae | Crane flies | Limonia humidicola |  |
| Lygistorrhinidae | Long-beaked fungus gnats | Lygistorrhina sanctaecatharinae |  |
| Mycetophilidae | Fungus gnats | Exechia spinuligera |  |
| Nymphomyiidae | Flies | Nymphomyia alba |  |
| Pachyneuridae | Gnats | Cramptonomyia spenceri |  |
| Pediciidae | Hairy-eyed craneflies | Pedicia rivosa |  |
| Psychodidae | Drain flies | Clogmia albipunctata |  |
| Ptychopteridae | Phantom crane flies | Ptychoptera contaminata |  |
| Rangomaramidae | Llong-winged fungus gnats | Rangomarama edwardsi |  |
| Scatopsidae | Minute black scavenger flies | Aztecatopse amorimi |  |
| Sciaridae | Dark-winged fungus gnats | Sciara hemerobioides |  |
| Simuliidae | Black flies | Simulium trifasciatum |  |
| Tanyderidae | Primitive crane flies | Protoplasa fitchii |  |
| Thaumaleidae | Solitary midges | Thaumalea verralli |  |
| Tipulidae | Crane flies | Nephrotoma appendiculata |  |
| Trichoceridae | Winter crane flies | Trichocera hiemalis |  |
| Valeseguyidae | Wood gnats | Valeseguya rieki |  |