According to an article in Pattaya Today by Paul DeCeglie, "Thailand is Dog Country."
He goes on to say, however, "Internationally, it is estimated that cats outnumber dogs by roughly two million, mainly because the feline species is more compact (you can fit more cats in your house or condo than you can German Shepherds, for example) and cats are easier to care for (try leaving those German Shepherds alone in your apartment over a three-day weekend).
"According to the market research firm Euromonitor, cats are the favored pet in most of Western Europe, with the exception of Spain, Portugal and Ireland. South America is strictly dog country, as is much of Asia. Some regions, like the Middle East and parts of Africa, have an especially long-standing appreciation of cats, while in Latin America it's the complete opposite
-- dogs are part of family life there."
In the United States, a total of 77.8 million dogs lived in households as pets vs. 85.8 million cats.
In some states, dogs outnumber cats as pets, but in other states we see quite the opposite. "Dog" states include Arkansas, New Mexico, Texas, Oklahoma, Louisiana, Mississippi, Arizona, Tennessee, Missouri and Georgia, in that order.
"Cat" states include Massachusetts, Maryland, Maine, Vermont, Connecticut, District of Columbia, New Hampshire, and Pennsylvania, in that order.
These and more statistics can be found at http://www.statista.com/statistics/198095/pets-in-the-united-states-by-type-in-2008/