Background and Objectives: Posture associated reduction in the endurance of deep cervical flexor (DCF) muscle endurance may negatively impact the proprioception of the cervical spine. As pertinent proprioceptive feedback is obligatory for rapid processing of visual feedback, visual reaction responses can be delayed with spindle dysfunction associated with poor muscle function. Hence, the aim of this study was to assess a correlation between head posture, DCF muscle endurance and reaction time in asymptomatic young healthy subjects. Method: Total 260 participants of the age group 18-24 year were recruited. One-time assessment of head posture, DCF strength and reaction time was done. Correlation analysis was done using Spearman Rank Correlation Coefficient (ρ). Result: The results of the analysis indicated a positive correlation between head posture and DCF endurance (r = 0.3541, p < 0.0001), a weak-to-moderate negative correlation between head posture and reaction time (r = -4727, p < 0.0001) and a moderate-to-strong negative correlation between DCF endurance and reaction time (r = -6787, p < 0.0001) Conclusion: Present study concludes the head posture, DCF endurance and simple reaction time are moderately associated with each other in young healthy adults.