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Is the population of mountain lions growing in North America?

April 5, 2026

Quick Answer

The population of mountain lions, also known as cougars or pumas, is growing in North America, with stable or increasing numbers reported in many western states and provinces.

Mountain Lion Habitat and Distribution

Mountain lion populations are expanding into new areas due to the decline of natural predators and human tolerance. In the western United States, for example, the population of mountain lions in California is estimated to be around 4,000-6,000 individuals, with a growth rate of 2-3% per year. Similarly, in Arizona, the mountain lion population is estimated to be around 2,500-3,500 individuals, with a stable population trend.

Human-Mountain Lion Conflict

As mountain lion populations grow, conflicts between humans and mountain lions are increasing. In areas where human development is encroaching on mountain lion habitat, encounters between the two species are becoming more common. In the western United States, for example, there were over 600 reported mountain lion attacks on humans between 1986 and 2017, resulting in 26 human fatalities. To mitigate these conflicts, it’s essential for humans to take precautions when hiking, camping, or engaging in outdoor activities in mountain lion country, such as making noise to avoid startling the animals and keeping pets on a leash.

Preventing Mountain Lion Attacks

To prevent mountain lion attacks, it’s crucial to be aware of the body language and behavior of these animals. If a mountain lion approaches, it’s essential to remain calm and speak in a firm voice to try to scare it away. If the mountain lion continues to approach, use any available objects (such as hiking poles or bear spray) to defend yourself. In the event of a mountain lion attack, try to remain upright and fight back with any available objects, aiming for the animal’s face, eyes, and nose.

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