Where People Settled in South Asia: Five Core Regions

South Asia's human geography reflects millennia of settlement along waterways, in fertile plains, and across diverse ecological zones. Five regions anchor the subcontinent's population:

1. Indus River Valley (Pakistan, NW India)

Cradle of the Indus Valley Civilization (2600-1900 BCE)—Mohenjo-daro, Harappa, Dholavira. Advanced urban planning, drainage, standardized weights. Today: Pakistan's demographic core (Punjab, Sindh) and India's Punjab.

2. Gangetic Plain (N India, Bangladesh, Nepal terai)

World's most densely populated large alluvial plain. Ganga, Yamuna, Brahmaputra, and tributaries deposit fertile silt. Historic empires (Maurya, Gupta, Mughal) and modern megacities (Delhi, Kolkata, Dhaka, Patna, Varanasi) thrive here.

3. Deccan Plateau (S India)

Triangular plateau bounded by Western/Eastern Ghats. Volcanic basalt (Deccan Traps) creates black cotton soils. Historic kingdoms (Satavahana, Chalukya, Vijayanagara, Maratha). Modern hubs: Bengaluru, Hyderabad, Pune, Chennai (coastal edge).

4. Coastal Regions

• West Coast (Arabian Sea): Konkan, Malabar, Gujarat coasts—maritime trade since Roman times; Mumbai, Kochi, Mangalore
• East Coast (Bay of Bengal): Coromandel, Circars, Bengal delta—Chola maritime empire; Chennai, Visakhapatnam, Paradip

5. Himalayan Foothills & Sri Lanka

• Siwaliks/Dooars/Valleys: Diverse ethnic groups (Gorkha, Lepcha, Bhutia, Pahari); hill stations (Shimla, Darjeeling); tea gardens
• Sri Lanka: Island civilization since 500 BCE; Anuradhapura, Polonnaruwa, Kandy; distinct Sinhalese/Tamil cultures

Monsoon agriculture, riverine trade, and mountain barriers created this enduring settlement template—still visible in today's population density maps.