Ajay Kumar Singh may refer to:
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A. K. Singh (full name Ajay Kumar Singh), Lieutenant Governor of Andaman and Nicobar Islands
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Ajay Kumar Singh (police officer) (died 2000), Superintendent of Police of Lohardaga district
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Ajay Kumar Singh (Bihar politician, Bharatiya Janata Party), former member of the Bihar Legislative Assembly
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Ajay Kumar Singh (Bihar politician, Indian National Congress), Bihar Legislative Assembly representative from Jamalpur
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Ajay Kumar Singh (Bihar politician, Rashtriya Janata Dal), member of the Bihar Legislative Council
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Ajay Kumar Singh (Uttar Pradesh politician), member of the Legislative Assembly of India
{{hndisambig, Singh, Ajay Kumar