Administrative divisions of India in the context of "Andhra State"

Northwest India is a loosely defined region of India. In modern-day, it consists of north-western states of the Republic of India. In historical contexts, it refers to the northwestern Indian subcontinent (including modern-day Pakistan).

In contemporary definition, it generally includes the states of Haryana, Himachal Pradesh, Punjab, Rajasthan Uttarakhand, and often Uttar Pradesh, along with the union territories of Chandigarh, Jammu and Kashmir, Ladakh, and the National Capital Territory of Delhi. Gujarat, a western coastal state, is occasionally included as well. The mountainous upper portion of Northwest India consists of the Western Himalayas, while the flat lower portion consists of the middle portion of the Indo-Gangetic plains and the Thar Desert.

The Tibetan Plateau, also known as the Qinghai–Tibet Plateau, Qingzang Plateau, or as the Himalayan Plateau, is a vast elevated plateau located at the intersection of Central, South, and East Asia. Geographically, it is located to the north of Himalayas and the Indian subcontinent, and to the south of Tarim Basin and Mongolian Plateau. Geopolitically, it covers most of the Tibet Autonomous Region, most of Qinghai, the western half of Sichuan, Southern Gansu provinces, southern Xinjiang province in Western China, Bhutan, the Indian regions of Ladakh and Lahaul and Spiti (Himachal Pradesh) as well as Gilgit-Baltistan in Pakistan, northwestern Nepal, eastern Tajikistan and southern Kyrgyzstan. It stretches approximately 1,000 kilometres (620 mi) north to south and 2,500 kilometres (1,600 mi) east to west. It is the world's highest and largest plateau above sea level, with an area of 2,500,000 square kilometres (970,000 sq mi). With an average elevation exceeding 4,500 metres (14,800 ft) and being surrounded by imposing mountain ranges that harbor the world's two highest summits, Mount Everest and K2, the Tibetan Plateau is often referred to as "the Roof of the World".

The Tibetan Plateau contains the headwaters of the drainage basins of most of the streams and rivers in surrounding regions. This includes the three longest rivers in Asia (the Yellow, Yangtze, and Mekong). Its tens of thousands of glaciers and other geographical and ecological features serve as a "water tower" storing water and maintaining flow. It is sometimes termed the Third Pole because its ice fields contain the largest reserve of fresh water outside the polar regions. The impact of climate change on the Tibetan Plateau is of ongoing scientific interest.

India is a federal union comprising 28 states and 8 union territories, for a total of 36 subnational entities. The states and union territories in turn are each subdivided into a total of around 800 districts, which contain further administrative subdivisions.

Under the Indian Constitution and laws, the states of India are self-governing administrative divisions, each having a state government. The legal power to manage affairs in each state is shared or divided between the particular state government on one hand and the national union government on the other. The union territories are directly governed by the union government; no state level government (and thus no division of power) exists in these jurisdictions.

Western India is a loosely defined region of India consisting of western states of Republic of India. The Ministry of Home Affairs in its Western Zonal Council Administrative division includes the states of Goa, Gujarat, and Maharashtra along with the Union territory of Dadra and Nagar Haveli and Daman and Diu, while the Ministry of Culture and some historians also include the state of Rajasthan. The Geological Survey of India includes Maharashtra but excludes Rajasthan whereas Ministry of Minority Affairs includes Karnataka but excludes Rajasthan.

Madhya Pradesh is also often included and Haryana, western Uttar Pradesh and southern Punjab are sometimes included. Western India may also refer to the western half of India, i.e. all the states west of Delhi and Chennai, thus also including Punjab, Kerala and surrounding states. The region is highly industrialised, with a large urban population. Roughly, Western India is bounded by the Thar Desert in the north, the Vindhya Range in the east and north and the Arabian Sea in the west. A major portion of Western India shares the Thar Desert with North India and Pakistan and the Deccan Plateau with South and Central India.

Central India refers to a geographical region of India that generally includes the states of Chhattisgarh and Madhya Pradesh.

The Central Zonal Council, established by the Government of India, includes these states as well as Uttar Pradesh and Uttarakhand to the north. The inclusion of Uttarakhand extends the region to the Himalayan border with Tibet/China.

East India is a region consisting of the Indian states of Bihar, Jharkhand, Odishaand West Bengal and also the union territory of the Andaman and Nicobar Islands.

The states of Bihar and West Bengal lie on the Indo-Gangetic plain. Jharkhand is situated on the Chota Nagpur Plateau. Odisha lies on the Eastern Ghats and the Deccan Plateau. West Bengal's capital Kolkata is the largest city of this region. The Kolkata Metropolitan Area is the country's third largest metropolitan region. The region is bounded by Bhutan, Nepal and the state of Sikkim in the north, the states of Uttar Pradesh and Chhattisgarh on the west, the state of Andhra Pradesh in the south and the country of Bangladesh in the east. It is also bounded by the Bay of Bengal in the south-east. It is connected to the Seven Sister States of Northeast India by the narrow Siliguri Corridor in the north east of West Bengal. East India has the fourth-largest gross domestic product of all Indian regions.

Northeast India, officially the North Eastern Region (NER), is the easternmost region of India representing both a geographic and political administrative division of the country. It comprises eight states: Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, and Tripura (commonly known as the "Seven Sisters"), and the "Brother" state of Sikkim. North-east India is one of the most linguistically diverse regions in the world.

The region has India's international border of 5,182 kilometres (3,220 mi) with five neighbouring countries: China to the north, Myanmar to the east, Bangladesh to the southwest, Nepal to the west, and Bhutan to the northwest. It comprises an area of 262,184 square kilometres (101,230 sq mi), almost 8 per cent of that of India and has a population of 45,772,188, almost 4 per cent that of India. The Siliguri Corridor connects the region to other parts of India.