K
- (Murakami Shi) Kamagui
- (Murakami Shi) Kawauchi
- (Murakami Shi) Kitaōdaira
- (Sado Shi) Kotoura
- (Sado Shi) Koshiboso
- (Sado Shi) Komanoue
- (Sado Shi) Kuratani
- (Sado Shi) Kamikawamo
- (Kashiwazaki Shi) Kunme
- (Kashiwazaki Shi) Kanō
- (Santō-gun) Katsumi
- (Santō-gun) Kutta
- (Nagaoka Shi) Kamiiwai
- (Nagaoka Shi) Kamiya
- (Nagaoka Shi) Kajikane
- (Nagaoka Shi) Kitanigoro
- (Nagaoka Shi) Kotsunagi
- (Nagaoka Shi) Karuizawa
- (Nagaoka Shi) Katsuramachi
- (Nagaoka Shi) Kamegaimachi
- (Nagaoka Shi) Kurozumachi
- (Ojiya-shi) Kamigatakai
- (Ojiya-shi) Kitayama
- (Nagaoka Shi) Kawaguchi-wanazu
- (Nagaoka Shi) Kodaka
- (Uonuma Shi) Kamiinakura
- (Tōkamachi-shi) Kamishinden
- (Tōkamachi-shi) Kojirakura
- (Tōkamachi-shi) Kiriyama
- (Tōkamachi-shi) Kamō