Cat Overpopulation Statistics
You can find statistics about the United States cat overpopulation crisis, which, incidentally, is not in general seen as a crisis but routinely accepted as ‘just one of things’. However, you’ll normally see statistics scattered throughout an article or over several articles. It can be difficult to pull all the figures together to try and get an overview. We are talking about cold cat facts with one caveat. We don’t know for sure how many cats are killed each year in the United States which could and should have been rehomed or should have remained in their original home.
Here are some cat facts from the United States that relate to the cat overpopulation problem. They are part of the problem. You will see some variation between studies (sources). This is normal because this is not a science. Relinquishments of cats refer to giving up a cat(s) to a cat shelter. You will see a wide range of statistics relating to cat overpopulation.
| The Criterion | The Statistics | The Source (usually a scientific study) |
| Number of cats euthanised in USA cat shelters in 1990 | 5.7 – 9.5 million | Kahler 1996 |
| Number of cats euthanised in USA cat shelters annually | 5 – 7 million | Mahlow & Slater 1996 |
| Number of cats euthanised in USA cat shelters annually | 4 million | Patronek et al 1996 |
| Number of cats euthanised in USA cat shelters annually. Assessed at 2007. | 3.26 million | P.H. Kass (The Welfare of Cats). Extrapolated from Californian figures below. |
| Number of cats euthanised in USA cat shelters annually | 3.18 million | Rowan 1992 as extrapolated from Massachusetts figures |
| Number of cats euthanised in USA cat shelters annually | 3.62 million | Rowan 1992 as extrapolated from NJ and NY figures combined. |
| Number of cats impounded in Californian Shelters 1992 | 484,173 | State of California |
| Number of cats euthanised in Californian Shelters 1992 | 391,435 (81% of cats impounded) | State of California |
| Percentage of cats euthanised because unadoptable. | 17% | Kass et al 2001. From 12 shelters across 5 states. |
| Median (average) age for cats presented to shelters to be euthanised. Yes, people ask shelter staff to kill their cat because it is a free service? | 10 years of age | Q: why ask a shelter to kill their cat? Why at age 10? |
| Percentage of female cats giving birth to an average of 2.43 litters before being spayed | 20% | Luke 1996. Some cat owners believe that a female cat should give birth before being sterilised. |
| Percentage of cats relinquished to 12 selected shelters in USA that were sterilised. | Slightly over 50% | Salman at al 1998. |
| Percentage of cat owners who acquired their cat from private owners. | 47% | Miller et al 1996 |
| Percentage of cat owners who acquired their cat as a stray cat. | 14% | Miller et al 1996 |
| Percentage of cat owners who acquired their cat from a pet store. | 11% | Miller et al 1996 |
| Percentage of cat owners who relinquished their cat who did not want to acquire a cat. | About 50% | Miller et al 1996 |
| Percentage of cats relinquished aged 7-12 months | 26% (the highest bracket) | Miller et al 1996 |
| The most common reason given for giving up cat to shelter | Moving home (29%) | Miller et al 1996 |
| The percentage of cats not sterilised that were relinquished because the cat’s owner was moving home. | 41% | New et al 1999 |
| The percentage of cats under 3 years of age that were relinquished because the cat’s owner was moving home. | 52% | New et al 1999 |
| Percentage of cat owners who relinquished because allergic to cat. | 15% | Miller et al 1996 |
| Percentage of cat owners who relinquished because they had a kitten that needed a home. | 24% (highest bracket in this study) | Luke 1996 |
| Percentage of cat owners who wanted to give up a stray kitten. | 18% | Luke 1996 |
| The most common reason for relinquishment under another study was: | ‘Human lifestyle issues’ at 35% of people. | Salman et al 1998 |
| Most common age of cat relinquished. | 5 months to 3 years (40% of cases) | Salman et al 1998 |
| Percentage of female to male cats relinquished. | 59% for females to 41% for males. | Salman et al 1998 |
| Percentage of purebred cats relinquished to moggies. | 7% purebred to 93% moggie. | Salman et al 1998 |
| Percentage of cats that were relinquished that were full-time indoor cats or ‘seldom went outdoors’ (‘true pets’). | 83% | Salman et al 1998 |
| The most common length of time people who relinquished to a shelter kept their cat. | 7-12 months (short). 30% of people. | Salman et al 1998 |
| Most common reason for relinquishment. | ‘I have too many cats’. 11% of respondents to a survey. | Salman et al 1998 |
| Percentage of cat owners who relinquished and asked that their cat be adopted by someone else. | 79% | Salman et al 1998 |
| Percentage of cat owners who relinquished and asked that their cat be killed (‘euthanised’) | 17% | Salman et al 1998 |
| Percentage of people who saw a veterinarian in the year before going to shelter to relinquish their cat. | 47% | Salman et al 1998 |
| Percentage of people who relinquished their cat to a shelter who said their cat soiled their home. | 24% | Salman et al 1998 |
| Percentage of people who relinquished their cat to a shelter who said their cat damaged their home. | About 24% | Salman et al 1998 |
| Percentage of people who relinquished their cat to a shelter who said their cat was ‘hyperactive’ (sometimes, mostly or always). | 33% | Salman et al 1998 |
| Percentage of people who relinquished their cat to a shelter who said their cat was fearful (sometimes, mostly or always) | 44% | Salman et al 1998 |
| Percentage of women to men who brought their cat to a shelter to be given up. | 60% (women) to 40% (men) | Salman et al 1998 |
| Most common age of person relinquishing their cat at shelter. | 31-40 years of age (33% of total). | Salman et al 1998 |
| Percentage of relinquishers who had an income over $75k pa. | 7% | Salman et al 1998 |
| Percentage of relinquishers who had an income under $12k pa. | More than 50% | Salman et al 1998 |
| Percentage of people relinquishing their cat at shelter who had ‘diminished level of understanding of aspects of pet ownership’… relative to what might be expected. | ‘Sizeable’ | Salman et al 1998 |
| Percentage of people who relinquished who believed that animals misbehaved out of spite. | 58% | Salman et al 1998 |
| Percentage of people who agreed that ‘rubbing a pet’s nose in messes is effective discipline’. | 29% | Salman et al 1998 |
| The age of relinquishers that were ‘overrepresented’ (most common). | 25-39 years of age | New et al 1999 |
| Percentage white people who are relinquishers. | 71% | New et al 1999 |
| Are young cats more likely to be abandoned? | Yes, Kittens under 6 months of age are 14x more likely to be given up compared to cats older than 5 years of age. | Patronek 1996 |
| Are cats acquired for free more likely to be relinquished? | Yes. | Patronek 1996 |
| Are relinquishers more likely to ignore a vet’s advice on cat behavior? | Yes on the basis that it was ‘impractical or unhelpful’. | Patronek 1996 |
| Does prior cat ownership reduce relinquishment? | Yes. | Patronek 1996 |
| The age of cats that had the lowest risk of being relinquished. | Aged between 10-14 years of age. | Salman et al 1998 |
| Are intact (unspayed) female cats more likely to be abandoned to a shelter? | Yes, by a factor of 4x (400%). | Salman et al 1998 |
| Are young people more likely to surrender their cat? | Yes. Highest age risk is 20-24 years of age. | Salman et al 1998 |
| Neutered males over intact male cats. | Neutered males 6x more likely to be adopted from a shelter. | Lepper at al 2002 |
| Are neutered males preferred to spayed females for adopters at shelters? | Yes by a factor of 1.56. | Lepper at al 2002 |
| What is the favourite cat coat type for shelter adopters? | White | Lepper at al 2002 |
| What are the 2nd and 3rd favourite cat coat types for shelter adopters? | Colourpoint (pointed cats such a Siamese) and grey cats. | Lepper at al 2002 |
| Are pure-bred cats preferred over ‘domestic shorthair cats’ for adopting people at shelters. | Yes by a factor of 2x. | Lepper at al 2002 |
| Percentage comparison of first time adopters to previous owners who rejected their cat having adopted him/her from a shelter. | 62% (first-timers) to 38% (previous owners). | Kidd et al 1992a, 1992b. |
One of the notable conclusions of the authors of the book from which these statistics are taken (The Welfare of the Cat – ISBN 978-1-4020-6143-1) is that in order to tackle the cat overpopulation problem ‘a fundamental re-education of the American public is also required..’. In my view education is the number one issue in cat overpopulation.
Note: there are many millions of wonderfully proficient cat loving people in the USA who care for their cats to a very high standard for the life of the cat. Also I have chosen figures for the USA out of convenience. This is a country where statistics are more readily available.
Link to original Flickr photo.
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