| Compagnia ferroviaria |
Logo & collegamento |
Kalmar Länstrafik (KLT)  |
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Kantō Railway  |
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| Kashima Rinkai Railway |
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Kazakhstan Temir Zholy  |
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Keewatin Railway  |
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| Keihan Electric Railway |
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| Keikyu Corporation |
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| Keio Railway |
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| Keisei Railway |
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Kenya Railways  |
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Keolis Deutschland  |
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Kereta Api Indonesia (Persero)  |
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| Kereta Commuter Indonesia (KRL) |
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Keretapi Tanah Melayu Berhad (KTMB)  |
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| Kinki Nippon Railway (Kintetsu) |
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| Kishu Railway |
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Kiwi Rail  |
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| Kobe Electric Railway (Shintetsu) |
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Koleje Dolnośląskie  |
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| Koleje Mazowieckie |
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| Koleje Śląskie |
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| Kollektivtrafikförvaltningen UL |
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| Kominato Railway |
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| Konan Railway |
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Konkan Railway  |
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Korail ou Korea Railroad  |
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Korean National Railway  |
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Kowloon Canton Railway  |
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| Krösatågen |
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| Kumagawa Railway |
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| Kumamoto Railway |
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| Kurobe Gorge Railway |
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Kyrgyz Railways  |
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| Kyushu Railway Company (JR Kyushu) |
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