The total measured length of India’s shared international land borders with its neighbours—China, Pakistan, Bangladesh, Nepal, Bhutan, and Myanmar—is referred to as the “Border Length, by Country.” The length, topography, and strategic importance of each border segment vary. For instance, India’s mountainous border with China and Nepal spans the Himalayas, but its longest border is with Bangladesh. These borders, which represent not only geographic demarcation but also political, cultural, and economic relationships with neighbouring countries, are maintained through international accords, security forces, and cross-border cooperation mechanisms.

Knowing each nation’s boundary length is crucial for diplomatic ties, defence preparation, and national security. It assists security agencies and lawmakers in efficiently allocating funds for infrastructure development, border management, and monitoring. Since many communities live in border regions with strong socioeconomic ties, border length also plays a significant role in trade, migration, and cultural exchanges. Furthermore, border lengths affect policy pertaining to illegal migration, smuggling, and cross-border terrorism, necessitating a coordinated response. Understanding the boundaries aids in the formulation of special programs for border regions, such as the Border Area Development Programme (BADP), in the context of developmental planning. In general, India’s border length distribution influences its economic cooperation, geopolitical policy, and regional stability.