Udaya Kumar or Udayakumar may refer to:

• Udaya Kumar (academic), professor at Jawaharlal Nehru University
• Udaya Kumar (designer), designer of the Indian rupee sign
• Udaya Kumar (director), Indian film director and editor
• K. Udayakumar, Indian volleyball player
• R. V. Udayakumar, Tamil actor and director
• S. P. Udayakumar, Indian anti-nuclear activist
• Udaykumar (1933–1985), Indian film actor and producer in Kannada cinema

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