Nakamurella
multipartita

Nannocystis
exedens - pusilla - sp.

Natrialba
aegyptia - asiatica - magadii - taiwanensis

Natroniella
acetigena

Natronincola
histidinovorans

Natronobacterium
gregoryi

Natronococcus
amylolyticus - occultus

Natronomonas
pharaonis

Nautilia
lithotrophica

Naxibacter
alkalitolerans

Neisseria
canis - cinerea - elongata - flavescens - gonorrhoeae - lactamica - meningitidis - mucosa - perflava - sicca - subflava - weaveri

Nereida
ignava

Nesterenkonia
aethiopica - halobia - halotolerans - lacusekhoensis - lutea - sandarakina - xinjiangensis

Nevskia
ramosa

Nicoletella
semolina

Nitratifractor
salsuginis

Nitratireductor
aquibiodomus

Nitratiruptor
tergarcus

Nitrobacter
hamburgensis - vulgaris - winogradskyi

Nocardia
abscessus - acidivorans - africana - alba - albiflava - altamirensis - amamiensis - anaemiae - aobensis - araoensis - arthritidis - asiatica - asteroides - beijingensis - brasiliensis - brevicatena - caishijiensis - carnea - cerradoensis - coeliaca - concava - crassostreae - cummidelens - cyriacigeorgica - devorans - elegans - exalbida - farcinica - flavorosea - fluminea - gamkensis - globerula - higoensis - ignorata - inohanensis - jejuensis - jiangxiensis - jinanensis - kruczakiae - lijiangensis - mexicana - miyunensis - neocaledoniensis - niigatensis - ninae - nova - novocastrense - otitidiscaviarum - paucivorans - pigrifrangens - pneumoniae - polyresistens - pseudobrasiliensis - pseudovaccinii - puris - roseoalba - salmonicida - seriolae - shimofusensis - sienata - soli - sp. - takedensis - tenerifensis - terpeniae - testacea - thailandica - transvalensis - tsunamiensis - uniformis - vaccinii - vermiculata - veterana - vinacea - xishanensis - yamanashiensis

Nocardioides
albus - alkalitolerans - aquaticus - aquiterrae - aromaticivorans - furvisabuli - ganghwensis - insulae - jensenii - kribbensis - lentus - luteus - nitrophenolicus - oleivorans - plantarum - pyridinolyticus - simplex - sp.

Nocardiopsis
aegyptia - alba - alkaliphila - arabicus - baichengensis - benisuefensis - buerjinensis - chakaensis - chromatogenes - composta - dassonvillei - exhalans - flavidus - fragmentaris - ganjiaensis - gilva - halophila - halotolerans - kunsanensis - listeri - lucentensis - metallicus - palisidis - prasina - rampartis - rhodophaea - rosea - salina - sp. - streptosporeus - synnemataformans - tangguensis, - trehalosi - tropica - umidischolae - xinjiangensis - yanqiensis

Nonomuraea
africana - angiospora - asiatica - dietziae - fastidiosa - ferruginea - helvata - kuesteri - latina - longicatena - polychroma - pusilla - recticatena - roseola - roseoviolacea - rubra - salmonea - sp. - spiralis - terrinata - turkmeniaca

Novosphingobium
aromaticivorans - capsulatum - hassiacum - lentum - pentaromativorans - rosa - stygium - subarcticum - subterraneum - taihuense - tardaugens