Dogs are the most common household pet in the United States, followed by cats and freshwater fish. Ownership figures differ between household counts and total animal counts, so rankings vary by how the data is measured.
Dogs are the most common household pet in the United States, followed by cats. Roughly 95 million U.S. households own at least one pet. Freshwater fish, birds, small mammals, and reptiles round out the leading companion animals. Still, the figures reported online rarely match because some sources count "households," while others count "individual animals." This guide explains that difference and uses the available popularity data to help you compare the favorite pets in the United States.
The Most Popular Pets in the United States Right Now
Measured by household share, dogs lead and cats come next. Freshwater fish, birds, small mammals, and reptiles each appear in several million homes. Total pet spending reached about $158 billion in 2025.
Top pets by household ownership
Roughly 71 million U.S. households own dogs, while 53 million own cats. Freshwater fish are found in about 10 million households. Birds, small mammals, and reptiles each appear in nearly 6 million households.
| Pet type | Households owning (source, year) | Total animals owned (source, year) | Reading note |
|---|---|---|---|
| Dogs | ~71 million U.S. households (NLM 2026) | ~89.7 million dogs (APPA 2023-24) | Household share is lower than total-animal share because many homes own more than one dog |
| Cats | ~53 million U.S. households (NLM 2026) | ~73.8 million cats (APPA 2023-24) | Multi-cat homes inflate total animals faster than household counts |
| Freshwater fish | ~10 million U.S. households (NLM) | ~139.6 million fish (APPA 2023-24) | Fish dominate total-animal counts while ranking lower by household ownership |
| Birds | ~6 million U.S. households (NLM) | ~12.8 million birds (APPA 2023-24) | Smaller household share; many owners keep multiple birds |
| Small mammals | ~6 million U.S. households (NLM) | Not stated as a comparable total-animal figure | Treat as household-prevalence data only |
| Reptiles | ~6 million U.S. households (NLM) | Not stated as a comparable total-animal figure | Treat as household-prevalence data only |
The table separates two useful questions: "How common is this pet in U.S. homes?" and "How many individual animals exist?" A pet may rank high by total animals because owners tend to keep groups, not because it appears in more homes.
Pets by total animals owned
Individual-animal totals are much higher than household counts because many homes have more than one pet. Freshwater fish lead at roughly 139.6 million, followed by dogs at about 89.7 million and cats at about 73.8 million. Birds account for roughly 12.8 million.
Dogs vs Cats: Which Is More Popular in America?
Dogs have a larger household share than cats across most of the country, although the gap narrows or reverses in certain regions.
Household share
Dogs appear in about 53% of households in the cited figures, compared with about 39% for cats. The pattern changes on the West Coast, where cats edge out dogs at 39% versus 37% of households.
Total animals owned
Measured by individual animals, dogs outnumber cats at roughly 89.7 million versus 73.8 million. Households with multiple pets push both totals upward, particularly for cats.
Why Pet Ownership Totals and Percentages Differ Across Sources
Conflicting figures usually result from different survey years, sampling frames, and definitions of "pet," rather than genuine disagreement about ownership trends.
Survey definitions
Some surveys count households that have at least one pet, while others count every individual animal. A survey may include farm animals or exclude fish; another may take the opposite approach. APPA, AVMA, and Census-linked estimates also draw on different samples and years, so their totals can shift even when the underlying level of ownership remains stable.
Reading conflicting data responsibly
Read each number as an estimate tied to a particular source and year, not as an absolute fact. Compare broad trends across sources instead of focusing on exact counts, and don’t combine incompatible totals into a single "true" figure.
The Third Most Popular Pet and Other Common Companions
Freshwater fish are the leading non-dog, non-cat companion when measured by total animals. Birds, small mammals, and reptiles follow, each with a smaller household share.
Fish and birds
Fish dominate individual-animal counts largely because owners keep them in groups. Birds, meanwhile, are found in roughly 6 million households. Keeping multiple birds is also common, which raises the total number of animals.
Small mammals and reptiles
Small mammals such as rabbits, guinea pigs, and hamsters appear in about 6 million households, as do reptiles. Both groups require stable habitats and regular care, so their popularity shouldn’t be mistaken for ease of ownership.
Side-by-Side Comparison of Leading U.S. Pet Types
| Pet type | Household prevalence (dated) | Typical space needs | Maintenance level | Typical lifespan | Beginner suitability |
|---|---|---|---|---|---|
| Dog | ~71 million households (NLM 2026) | High; needs exercise space | High; daily care and training | 10-15+ years | Moderate; best with time and budget |
| Cat | ~53 million households (NLM 2026) | Moderate; indoor space | Moderate; litter and play | 12-18 years | Good; independent but needs routine |
| Freshwater fish | ~10 million households (NLM) | Low-moderate; tank space | Moderate; water quality | 2-5 years (typical) | Good starter with proper setup |
| Bird | ~6 million households (NLM) | Moderate; cage plus flight | Moderate-high; daily interaction | 5-15+ years | Moderate; noise and mess |
| Small mammal | ~6 million households (NLM) | Moderate; enclosure plus exercise | Moderate; cleaning | 2-8 years | Good; short lifespan, frequent cleaning |
| Reptile | ~6 million households (NLM) | Moderate; heated enclosure | Moderate-high; heat and UV | 5-20+ years | Moderate; equipment-dependent |
Practical trade-offs matter more than popularity. Dogs are common but demanding, while fish cost less to set up yet remain sensitive to water quality.
Annual Costs and Routine Veterinary Care by Pet Type
| Pet type | Annual food and supplies (range) | Routine veterinary care (range) | Key cost drivers | Notes |
|---|---|---|---|---|
| Betta fish (heated 5-gal) | $120-$220 | $40-$120 | Water quality, heater | Lower-cost category |
| Indoor cat | $450-$850 | $250-$600 | Preventive visits, litter | Moderate-cost category |
| Medium dog (40-60 lb) | $900-$1,800 | $400-$900 | Food volume, prevention | Higher-cost category |
A worked example puts these costs in context. A cat with a 12-15 year horizon and a $1,000 emergency reserve may require roughly $9,000-$23,000 over its life. A medium dog with a 10-13 year horizon may require roughly $14,000-$36,000. These figures are planning ranges rather than quotes, and veterinary prices vary by location. Over a pet’s lifetime, preventive care, emergencies, and lifespan usually affect total cost more than the initial purchase price.
Routine veterinary care
Routine care covers exams, vaccines, parasite prevention, and dental planning. Expenses rise with the animal’s size and species-specific needs. Birds and reptiles often require exotic-animal veterinarians, whose visits may cost more.
Lifetime cost planning
Multiply the annual range by a realistic lifespan, then include an emergency reserve. If the annual total exceeds about 5% of take-home pay, pause and scale the plan back.
Best Pets for Apartments and First-Time Owners
Animals with modest space, noise, and odor demands generally suit small homes better than large, high-energy dogs. Before choosing, check the rules set by your landlord and HOA.
Apartment-friendly choices
Fish, small mammals, and some reptiles can fit apartment life well. Cats also tend to adapt to indoor living. Large or vocal dogs may have difficulty in smaller spaces or fall under lease restrictions.
First-owner learning curves
A pet’s suitability for a beginner depends on available space, daily time, and budget—not its popularity. Families can also consider choosing a suitable pet for a child alongside the child’s age and ability to help with daily care. Short-lived animals with lower maintenance needs may be easier starting points, but they still require stable habitats and consistent care. Brachycephalic (short-nosed) dog and cat breeds face airline cargo bans because of breathing risk, and most U.S. airlines refuse cabin transport for small mammals and reptiles.
Adopting vs Buying: Responsible Starting Points
Adopting through a shelter or rescue saves lives and often has a lower upfront cost. Reputable breeders may suit owners who need greater predictability in size, temperament, or health testing. Neither option is responsible when housing, budget, or schedule remains unstable.
Ask the shelter, rescue, or breeder about the animal’s age, medical history, behavior, vaccines, and return policies. Warning signs include a source that asks you no questions, pressures you to decide today, provides no veterinary records, or arranges to meet in a parking lot. If two or more red flags appear, stop and find another source—or wait.
Regional, Demographic, and Legal Context for Less Common Pets
Dogs and cats dominate in most regions, but ownership of smaller pets and exotics varies with climate, housing, and local regulations. On the West Coast, cats lead dogs (39% versus 37% of households). Dog ownership reaches about 44% of households in the Northeast and South. Gen Z and Millennials are driving growth in cat ownership.
Regional patterns
Because regional surveys are limited, their findings are best read as directional. Climate shapes whether a pet can safely spend time outdoors, while housing density affects which species fit comfortably.
Legal and zoning checks
State and local restrictions may apply to reptiles, backyard poultry, and exotic pets. Dogs entering the U.S. must be at least six months old, have an ISO microchip, and be accompanied by a CDC Dog Import Form. Most airlines won’t transport reptiles as passenger baggage. Confirm local laws and zoning rules before adopting or buying any animal.
Choosing Your Companion: A Practical Decision Checklist
Start by matching the pet type to your home’s size, your budget, your available time, and your experience. Confirm local laws and housing rules before making a decision. Prepare a first-year care and veterinary plan, then review the comparison table using your own limits.
- ☐ Space: Measure the animal’s adult enclosure or living area, not the baby size.
- ☐ Time: Estimate daily care in minutes; choose a pet whose minimum daily time fits your worst weekday.
- ☐ Budget: Add food, routine veterinary care, supplies, grooming, insurance or savings, and emergency reserve.
- ☐ Lifespan: Match the commitment to your realistic horizon.
- ☐ Maintenance: Rate cleaning, odor, noise, shedding, and handling from 1 to 5; eliminate pets scoring 4 or 5 in two or more categories if you are a first-time owner.
- ☐ Shortlist rule: Keep only pets that pass all five checks.
| Pet Type | Households Owning | Total Animals Owned | Space Needs | Maintenance Level | Typical Lifespan | Beginner Suitability |
|---|---|---|---|---|---|---|
| Dogs | ~71 million U.S. households (NLM 2026) | ~89.7 million dogs (APPA 2023-24) | High; needs exercise space | High; daily care and training | 10-15+ years | Moderate; best with time and budget |
| Cats | ~53 million U.S. households (NLM 2026) | ~73.8 million cats (APPA 2023-24) | Moderate; indoor space | Moderate; litter and play | 12-18 years | Good; independent but needs routine |
| Freshwater fish | ~10 million U.S. households (NLM) | ~139.6 million fish (APPA 2023-24) | Low-moderate; tank space | Moderate; water quality | 2-5 years (typical) | Good starter with proper setup |
| Birds | ~6 million U.S. households (NLM) | ~12.8 million birds (APPA 2023-24) | Moderate; cage plus flight | Moderate-high; daily interaction | 5-15+ years | Moderate; noise and mess |
| Small mammals | ~6 million U.S. households (NLM) | Not stated as a comparable total-animal figure | Moderate; enclosure plus exercise | Moderate; cleaning | 2-8 years | Good; short lifespan, frequent cleaning |
| Reptiles | ~6 million U.S. households (NLM) | Not stated as a comparable total-animal figure | Moderate; heated enclosure | Moderate-high; heat and UV | 5-20+ years | Moderate; equipment-dependent |
FAQ
What is the most common household pet in the US?
Dogs are the most common household pet in the United States by share of pet-owning households, followed by cats. Exact percentages vary by survey year and source, so figures should always be read with their source and date.
How many U.S. households own a pet versus how many total animals are owned?
Household ownership measures how many homes have at least one pet, while total animal counts add up every individual animal, including multiple pets in one home. Because many households own more than one animal, total animal counts are always higher than household counts.
What pets are easiest for beginners to care for?
Beginner suitability depends on space, daily time, and budget rather than popularity alone. Small, short-lived, low-maintenance animals such as certain fish or small mammals are often easier starters, but even these need stable habitats and consistent care.
Which pets are best for apartments or small homes?
Pets with low space, noise, and odor demands—such as fish, small mammals, or some reptiles—often suit apartments better than large, high-energy dogs. Always check landlord and HOA rules before choosing.
Which pets are most popular in different U.S. regions?
Dogs and cats dominate most regions, but the mix of smaller pets and exotics varies by climate, housing, and local rules. Regional surveys are limited, so treat regional claims as directional rather than exact.