Background: Unlike in the adult population apex beat position varies with advancing age and getting localized to a particular space at a certain age group in children. The standard way of quoting apex beat is in relation to the midclavicular line. However, there is a paucity of literature on the surrogate marker of the midclavicular line. Objective: To localize the apex beat in various age groups of apparently healthy children in the form of intercostal space & to find a correlation between the Apex beat position from the midclavicular line to various anatomic landmarks. To find a surrogate landmark for the midclavicular line. Materials and Methods: In a cross-sectional study carried out in the Department of Paediatrics, a total of 710 healthy Indian children including newborns to 14 years of age were enrolled. Apex beat location in the intercostal space was determined and the distance of the apex beat from the midsternal line, left sternal margin, mid-clavicular line and nipple line were measured. Anthropometric measurements were done. Results: Correlation between Apex beat position from Midclavicular line to 3 different anatomic landmarks showed statistically significant value in all age groups was left sternal margin.In children up to the age of three years, the apex beat was in the 4th left intercostal space lateral to the midclavicular line. Above seven years, it was located in the 5th left intercostal space medial to the midclavicular line. Conclusion: The findings in the present study have established the surrogate marker for the midclavicular line was the left sternal margin. All Children above 7 years of age have apex beat at the 5th intercostal space medial to the midclavicular line.