Why Do People Have Pets?
People keep pets mainly for companionship, mental-health benefits, routine, and documented positive effects on stress, blood pressure and loneliness.
Quick Answer
People keep pets mostly for companionship. Every major survey (American Pet Products Association, PDSA in the UK, Rover annual reports) consistently finds "love and companionship" is the number one reason cited. After that, benefits pile up: mental-health support, routine and structure, physical activity (especially for dog owners), security, teaching children responsibility, and a substantial reduction in loneliness for people living alone.
Peer-reviewed research links pet ownership with lower blood pressure, lower cortisol, higher oxytocin during interactions, and slightly better recovery from cardiac events. The effect is real but modest, and it depends heavily on the bond between owner and animal.
The Documented Reasons People Cite
- Companionship (78 percent): presence at home, someone to greet you.
- Fun and enjoyment (61 percent): play, personality, entertainment.
- Reduce stress (54 percent): a nervous-system regulator in daily life.
- Teach children responsibility (48 percent, among parents): chores, empathy, routine.
- Health and exercise (42 percent, dog owners): daily walks add up.
- Security (28 percent): especially for lone occupants of a home.
What the Science Says
Multiple meta-analyses in Circulation, JAMA and Frontiers in Psychology have found pet ownership correlates with:
- 2 to 6 mmHg lower systolic blood pressure in resting states.
- Modest reduction in cortisol after 20 minutes of interaction.
- Faster cardiac rehabilitation after acute events.
- Lower reported loneliness scores in older adults living alone.
- Higher likelihood of meeting daily walking guidelines (dog owners specifically).
The Emotional Layer
Beyond the measurable, people describe pets as unconditional company, a source of routine that anchors a day, and a bridge to social connection ("dog park friends"). For many people who have moved cities, live alone, or have experienced loss, the pet becomes central to their emotional daily rhythm.
Downsides People Underweight
Time commitment (dogs need 1 to 2 hours a day of attention), cost (average lifetime cost 15,000 to 30,000 USD per dog in the US), grief when they die, restrictions on housing and travel, and allergy risks. People considering a first pet should think through the whole 12 to 18 year commitment.
Global Pet Ownership Snapshot 2026
- United States: around 66 percent of households own a pet (APPA, 2024 to 2026 surveys).
- United Kingdom: around 57 percent (PDSA 2025 report).
- Australia: around 69 percent - the highest per-capita rate globally.
- Canada: around 60 percent.
- Japan: around 30 percent, with a strong preference for smaller apartment-suitable breeds.
Generational Trends
Millennials and Gen Z now own pets at higher rates than any prior generation in Western countries, and they spend more per pet per year than boomers. Pets are increasingly framed as "fur children" in this cohort, which drives premium food, insurance, day-care and boutique-vet spending.
When Not to Get a Pet
Long working hours, frequent travel, unstable housing, undiagnosed allergies in the household, or a purely aesthetic motive are all warning signs. The best pet ownership starts from an honest reckoning with the daily commitment.
Companionship Is the Reason People Name First
Across national surveys in the US, UK and Australia, the most common answer to why people keep pets is companionship, followed by love of animals, and then by wanting company for children. Practical reasons such as security or pest control now rank near the bottom in urban households, which is a reversal of how pet keeping worked for most of human history.
That shift matters because it changes what people expect from an animal. A pet bought for company is judged on affection and presence rather than on function, which is part of why spending per animal has climbed so sharply.
What Pets Provide That Is Hard to Get Elsewhere
- Unconditional routine. A dog needs walking at roughly the same times every day whether you feel like it or not, and that external structure is protective for people living alone.
- Touch. Stroking an animal is one of the few socially easy sources of physical contact for adults who live by themselves.
- Social bridging. Dog owners talk to strangers more often than non owners, and dog parks function as genuine local networks.
- Being needed. Caring for something that depends on you is repeatedly cited as the single most valued part of ownership by older owners.
The Costs People Underestimate
Average lifetime cost for a medium sized dog in the US runs well into five figures once food, insurance, routine vet care and boarding are counted. Time is the other cost: a dog left alone for nine hours a day is a welfare problem, not a lifestyle choice.
The honest test before getting a pet is whether you want that specific animal's company for the next 10 to 15 years, including the parts that are inconvenient.
Bottom Line
People keep pets mostly for companionship and the structure they bring to a day, and the research backs up the felt benefits: lower loneliness scores, more daily movement for dog owners, and measurable stress reduction during interaction. The trade offs are cost, time and the grief that comes at the end, which is why the best reason to get a pet is wanting the animal itself rather than wanting a therapy tool.