If you want to find an Asian wife but aren't sure which country you want to find a wife from then one of these general Asian dating sites might be a good place to start.
Generally speaking you'll find that Asian ladies looking for Western husbands are mostly from Thailand, The Philippines and China. There are vast differences between these countries!
In general, Western men seem to prefer to marry Thai ladies from poor families who come from the North or South of the country. The Thai/Western marriage scene is very well developed and Thai ladies normally know what to expect when they marry a Western man, since many Thai ladies usually know a friend or relative who has a Western husband. Thailand is an attractive retirement destination. While Thai ladies are OK with moving to your own country, the can find it tough. The weather can be much colder in Western countries. Since most of these ladies have little education or English speaking abilities, they can struggle to find good jobs in a Western country.
The Philippines is a very poor country so marrying a Western man is an obvious way out of poverty for many Filipinos and their families. Filipinas make good wives for Western men as they have good English skills. They also tend to be Christians which makes them popular Asian wives for men whom religion plays an important part in their lives. Most Asian dating sites are awash with Filipina girls.