Kangiella
aquimarina - koreensis

Kerstersia
gyiorum - sp.

Ketogulonicigenium
robustum

Kibdelosporangium
albatum - aridum - philippinense

Kineococcus
aurantiacus - radiotolerans

Kineosphaera
limosa

Kineosporia
aurantiaca - mikuniensis - rhamnosa - rhizophila - succinea

Kingella
denitrificans - kingae - oralis - potus - sp.

Kitasatoa
antimyceticus

Kitasatospora
arboriphila - azatica - cineracea - cochleata - cystarginea - gansuensis - griseola - kifunensis - mediocidica - niigatensis - nipponensis - paracochleata - paranensis - phosalacinea - putterlickiae - recifensis - sampliensis - setae - sp. - terrestris

Klebsiella
aerogenes - oxytoca - pneumoniae - sp. - trevisanii - variicola

Kluyvera
ascorbata - cryocrescens - georgiana - intermedia

Knoellia
sinensis - subterranea

Kocuria
aegyptia - carniphila - himachalensis - kristinae - marina - palustris - polaris - rhizophila - rosea - varians

Kofleria
flava

Koserella
trabulsii

Kozakia
baliensis

Kribbella
alba - antibiotica - flavida - jejuensis - karoonensis - koreensis - lupini - sandramycini - solani - swartbergensis - yunnanensis

Ktedobacter
racemifer

Kurthia
gibsonii - sibirica - zopfii

Kutzneria
albida - kofuensis - viridogrisea

Kytococcus
schroeteri - sedentarius