Where Are Tigers Found in India? Regions & Reserves

India is home to roughly 60 percent of the world’s remaining wild tigers, yet the species occupies less than 7 percent of its former geographical range across the subcontinent.¹ Around 50 tiger reserves now cover about 72,750 square kilometers and hold roughly two-thirds of the country’s approximately 3,000 tigers.² These reserves are scattered across dramatically different habitats, from the sal forests at the foot of the Himalayas to the tidal mangroves of the Sundarbans, and each region poses its own set of challenges for the cats that live there.

The Shivalik Hills and Terai Arc

Northern India’s tiger country runs along the foothills of the Himalayas and the adjoining Terai floodplains, a belt of moist deciduous and riverine forest stretching from Uttarakhand through Uttar Pradesh. The flagship reserve here is Jim Corbett National Park in Uttarakhand, which harbors the largest and highest-density tiger population of any protected area in the world.³ Corbett’s combination of thick sal forest, open grasslands, and the Ramganga River valley creates ideal conditions: abundant deer and wild boar, reliable water year-round, and relatively little human encroachment within the core zone.

Other reserves in this belt include Rajaji Tiger Reserve (also in Uttarakhand), Dudhwa and Pilibhit in Uttar Pradesh, and Valmiki in Bihar. Together they form a chain that, on paper, links Indian tiger habitat with Nepal’s Terai Arc Landscape. Researchers have worked to map potential corridors connecting tiger-bearing protected areas in Nepal with those across the Indian border, because maintaining cross-border movement is one of the few ways to keep gene flow going in populations that would otherwise be small and isolated.⁴ In practice, the corridors between these reserves are patchy, broken by farmland, highways, and growing towns.

Central India’s Tiger Heartland

If any single region defines tiger conservation in India, it is the central highlands spread across Madhya Pradesh, Maharashtra, Chhattisgarh, and parts of Rajasthan and Odisha. Madhya Pradesh alone has more tiger reserves than any other state, including marquee names like Kanha, Bandhavgarh, Pench, Satpura, and Panna. Maharashtra’s Tadoba-Andhari and Melghat add to the cluster. The landscape is largely dry and moist deciduous forest dominated by teak and sal, interspersed with bamboo thickets and grassy meadows.

What makes central India particularly important is that its reserves are close enough to each other, geographically, that tigers can potentially move between them. Studies of genetic structure confirm that the tiger populations in this region show high rates of both historical and contemporary gene flow, with the strongest gene flow occurring between reserves connected by forested corridors.⁵ That connectivity is under pressure, though. The shortest connecting path between Kanha and Pench, two of the most famous reserves in the country, runs about 171 kilometers through a landscape where the link is significantly weakened at several points by human land use.⁶

Landscape-level genetic analysis has been used to identify and rank corridors across seven tiger populations in this region, and the good news is that many corridors still appear to be functional, with evidence of recent tiger migration between reserves.⁷ The bad news is that “functional” does not mean “secure.” A corridor that works today can be severed by a new highway or a stretch of farmland expansion within a few years.

The Western Ghats and Southern India

Southern India’s tiger populations are concentrated along the Western Ghats mountain chain, which runs parallel to the coast from Gujarat down through Maharashtra, Goa, Karnataka, Kerala, and Tamil Nadu. The Nilgiri Biosphere Reserve, encompassing Bandipur, Nagarahole (Rajiv Gandhi), Mudumalai, and Wayanad, forms one of the largest contiguous blocks of tiger habitat anywhere. The moist evergreen and semi-evergreen forests of the Ghats, combined with reliable rainfall and rich prey populations, support some of the country’s healthiest tiger numbers.

Tiger density in a given area tracks closely with prey availability. Across Indian reserves, tiger density is strongly correlated with the biomass of prey species in the landscape.⁸ The Western Ghats reserves tend to score well on this metric because they support large herds of chital, sambar, gaur, and wild pig. The result is that reserves like Bandipur and Nagarahole regularly report high tiger densities, making them the southern counterpart to Corbett in the north.

Further south, Periyar Tiger Reserve in Kerala and Kalakad-Mundanthurai in Tamil Nadu round out the Western Ghats cluster. Beyond the Ghats, the Eastern Ghats have far fewer tigers and more fragmented habitat. Nagarjunasagar Srisailam Tiger Reserve in Andhra Pradesh, the country’s largest tiger reserve by area, illustrates the contrast: sprawling territory but relatively low tiger densities, partly because of the infrastructure and human activity cutting through it.⁹

The Sundarbans Mangrove Tigers

The Indian Sundarbans, shared with Bangladesh, host what may be the most ecologically unusual tiger population on Earth. These tigers live in tidal mangrove forests, swim between islands, and prey on species far smaller than the deer and wild boar their inland cousins eat. GPS tracking shows that Sundarbans tigers strongly prefer patches of Avicennia-Sonneratia mangrove, though the majority of their recorded locations fall within the more abundant Phoenix-dominated habitat simply because there is more of it.¹⁰

Genetic and morphological studies suggest these mangrove tigers are not just behaviorally different from other Bengal tigers. Researchers have found evidence that the Sundarbans population is in the early stages of separating from other Bengal tiger populations entirely, a slow divergence driven by their isolation and adaptation to a radically different environment.¹¹ They tend to be smaller-bodied and have adapted behaviors, like regular swimming, that you do not see in other populations. Whether this divergence will ever reach the point of full reproductive isolation is an open question, since that process takes millions of years in mammals, but the trajectory is clear enough that some researchers treat the Sundarbans population as a distinct conservation unit.

The Sundarbans also face a threat that no other Indian tiger landscape does at the same scale: sea-level rise. Climate modeling projects that the combined effects of warming and rising seas could eliminate suitable tiger habitat in the Bangladesh Sundarbans entirely by 2070.¹² The Indian side of the Sundarbans is marginally higher in elevation but faces similar pressures. If the mangroves drown, the tigers there have nowhere to go; there is no suitable adjacent habitat they could shift into.

Northeast India and the Brahmaputra Floodplains

The northeast sits at the intersection of two major tiger conservation landscapes: the Indian subcontinent’s and Southeast Asia’s. The key reserves here are Kaziranga and Manas National Parks in Assam, along with smaller protected areas like Orang and Nameri. Kaziranga is far more famous for its one-horned rhinoceroses, but it supports a substantial tiger population as well, and its floodplain grasslands and semi-evergreen forests provide excellent habitat.

Genetic work across these four protected areas has revealed something troubling beneath the surface. Tigers in the northeast split into three genetically distinct clusters: Kaziranga-Nameri, Manas, and Orang. Orang’s population stands out as particularly isolated. Despite being geographically close to Kaziranga and having corridors on the map between them, Orang’s tigers show markedly reduced genetic diversity and an effective population size so low that the population appears to be experiencing ongoing genetic erosion even as raw numbers grow.¹³ Human settlements along the corridors are the likely barrier. A population can bounce back in headcount while still losing genetic health, a decoupling that standard monitoring can miss.

Climate projections suggest the Brahmaputra valley will remain the primary tiger habitat in this region going forward, but under severe warming scenarios, tigers may shift their range northward and eastward into higher-altitude areas of Arunachal Pradesh. The most critical conservation zones, covering a small fraction of the total area, lie within the riverine corridor of Assam, often outside the boundaries of existing protected areas.¹⁴ That is a problem, because protection outside reserves is much harder to enforce.

The Panna Comeback

Panna Tiger Reserve in Madhya Pradesh provides one of the most dramatic stories in Indian conservation. By the late 2000s, poaching had driven the reserve’s tiger population to local extinction. The reserve had none. Starting in 2009, wildlife authorities began reintroducing tigers, initially with very limited options: the founder females had only a single male available for mating.¹⁵ As more males were brought in, females showed clear preferences among available mates, underscoring that adequate mate choice matters for reintroduction programs.

The results have been striking. Since 2009, 18 founding females have produced 120 cubs across 45 litters, and by 2021 the reserve held 59 individuals with a growth rate of around 26 percent.¹⁶ Researchers attribute Panna’s success to a combination of high genetic diversity in the founders, relatively low human disturbance within the reserve, careful execution, and the use of GPS and VHF collaring to monitor tiger movements in real time.¹⁷ Panna’s recovery is now treated as a template for how to bring tigers back to reserves where they have been wiped out. The practical lesson is blunt: technology and planning matter, but so does giving the founding population enough genetic and social options to build a viable community.

Why Corridors Between Reserves Matter as Much as the Reserves Themselves

India’s tiger conservation model was designed with a clear logic: create well-protected source populations inside reserves, then link them through forested corridors so that tigers can disperse between reserves and into surrounding habitat.² The source-sink framework recognizes that most individual reserves are too small, on their own, to maintain genetically healthy populations over the long term. A male tiger’s home range can cover well over 100 square kilometers, and young males dispersing to establish their own territory need to be able to move across the landscape.

When corridors work, the payoff is measurable. Populations connected by forest corridors in central India show the highest rates of contemporary gene flow, which means tigers are actually moving through those corridors and breeding in new populations.⁵ When corridors fail, the consequences show up in the genome. A study comparing small, isolated tiger populations with large, well-connected ones found dramatically higher levels of inbreeding and a heavier burden of harmful genetic mutations in isolated groups. Tigers in a small, isolated population carried on average around 2,000 homozygous damaging mutations per individual, compared with fewer than 1,600 in a large, connected population.¹⁸ That difference is not academic: it translates to reduced fertility, lower cub survival, and weaker immune systems.

Roads, Railways, and the Infrastructure Squeeze

India’s rapid infrastructure expansion poses a growing problem for tiger reserves. Major highways bisect several reserves, changing how animals behave and move through the landscape. In Nagarjunasagar Srisailam Tiger Reserve, researchers documented that vehicular traffic altered mammal occurrence, density, and activity patterns, with shifting traffic intensities at different hours affecting when and where animals ventured near roads.⁹ Similar problems have been documented in Madhya Pradesh tiger reserves, where road mortality of various wildlife species was tracked over more than a decade, highlighting the ecological damage caused by traffic through protected areas.¹⁹

The issue goes beyond direct road kills. Roads fragment habitat, create noise and light pollution, and discourage tigers from crossing between patches of forest. A four-lane highway with steady truck traffic can function as an invisible wall, cutting a continuous tiger population in two. Proposed railway lines, canal projects, and power transmission corridors all compound the effect. Some reserves have pushed for wildlife underpasses or overpasses, but these structures are expensive, and their effectiveness depends on location, design, and whether animals learn to use them.

Prey Availability Sets the Ceiling

You can protect all the forest you want, but if there are not enough deer, wild boar, and other prey animals, tigers will not thrive. Research across multiple Indian reserves shows that tiger density tracks prey biomass closely. The relationship is strong enough that prey availability models can predict how many tigers a reserve can support. In one reserve with an 893-square-kilometer core area, prey density analysis predicted the habitat could sustain more than 30 tigers.²⁰

This has a practical implication that sometimes gets overlooked. When tiger numbers plateau or decline in a reserve, the reflex is often to look for poaching or habitat loss. Sometimes the answer is simpler: the prey base has been depleted, whether by disease, competition with livestock, or poaching of deer and boar for bushmeat. Restoring prey populations can be as important for tiger recovery as anti-poaching patrols.

Genetic Health and the Hidden Cost of Small Populations

India’s roughly 3,000 tigers sound like a lot compared with the low hundreds of a few decades ago, but they are spread across dozens of reserves, and many individual populations are small enough to face genetic problems. The genomic evidence is sobering. In small, isolated populations, average inbreeding levels are substantially higher than in large, well-connected ones, and the burden of harmful mutations that become exposed through inbreeding is measurably greater.¹⁸ Even populations that have rebounded numerically can carry the genetic scars of a past bottleneck for generations.

The northeast offers a case study in this dynamic. Orang’s tiger population has grown in recent years, which looks like a success on paper. But genomic screening reveals reduced genetic diversity and an extremely small effective population size, meaning the number of individuals actually contributing genes to the next generation is tiny.¹³ Standard wildlife monitoring, which counts heads and tracks territory, would not catch this problem. It takes genetic sampling to see that a population recovering in number may simultaneously be deteriorating in health. That gap between what census data shows and what genetic data reveals is one of the underappreciated challenges of Indian tiger conservation.

Rajasthan’s Dry-Forest Tigers

Western India contributes a smaller but still significant share of tiger habitat. Ranthambore Tiger Reserve in Rajasthan is probably India’s most photographed tiger reserve, thanks to its open, dry deciduous forests and the dramatic backdrop of an ancient fort. Sariska, also in Rajasthan, went through its own extinction and reintroduction cycle similar to Panna’s, losing all its tigers to poaching in the mid-2000s before animals were translocated from Ranthambore. The arid and semi-arid landscapes of Rajasthan present different challenges from the wetter forests of central and southern India: water scarcity, sparse vegetation cover, and intense human pressure from surrounding agricultural communities. Tiger densities in these dry forests tend to be lower than in the moister reserves of Madhya Pradesh or the Western Ghats, reflecting both the harsher habitat and the reduced prey base.

What Ranthambore does well is demonstrate that tigers can coexist with tourism and relatively dense surrounding human populations when management is tight. The reserve generates significant revenue from wildlife tourism, which in turn funds protection. That economic feedback loop, where living tigers are worth more than dead ones, is a model other reserves have tried to replicate with varying success.

How Tiger Numbers Are Actually Counted

India conducts a national tiger census roughly every four years, coordinated by the National Tiger Conservation Authority and the Wildlife Institute of India. The methodology has evolved over the decades from pugmark tracing, which was unreliable and politically manipulable, to camera trapping combined with statistical modeling. More recently, non-invasive genetic sampling has been validated as a complementary tool. In one study comparing fecal DNA surveys with camera-trap surveys in Bandipur, the two methods produced nearly identical population estimates, lending confidence that genetic sampling can serve as a reliable cross-check.²¹

Each method has trade-offs. Camera traps are excellent for individually identifying tigers by their stripe patterns but require dense deployment and are limited by battery life and weather. Genetic sampling from scat can cover larger, more remote areas and provides information about relatedness and inbreeding that no camera can capture, but lab processing is expensive and slow. In practice, the most accurate picture comes from using multiple methods together, and that is increasingly what India’s census relies on. The shift matters because accurate counts are the foundation on which every conservation decision rests. Overcount tigers and you underfund protection; undercount them and you misallocate resources to areas that are already doing fine.