Okcupid is one of the world's top dating sites.
Despite concern by traditionalists that whites aren't biased enough towards their own race, dating site statistics demonstrate whites to be the most biased of all the races.

In 2009, the dating site okcupid released data demonstrating that male and female whites are more than three times more likely to express in-group dating biases then blacks of either gender. Whites are at least two times more likely to say that interracial marriage is a "bad idea" than either Asians or Hispanics.

When asked: "Would you strongly prefer to date someone of your own skin color/racial background?" a full 45% of Whites answered "yes," while only 20% of minorities (black, Pacific Islander, Asian, Hispanic, Indian, Native American, Middle Eastern) answered the same way.

When it comes to interracial attraction the results are perhaps more startling.

Asian, black, and Hispanic females all prefer white males over their own males!

Black and Pacific Islanders both prefer white females over their own females. In fact, black males were more than 27% more likely to respond to a white female messenger than to a black female one.

Overall, whites are considered to be the most attractive of all the races, but they are the least likely to date or marry outside their own race.

Excerpts from OKCupid study:
"Black women write back the most [to messages]. Whether it’s due to talkativeness, loneliness, or a sense of plain decency, black women are by far the most likely to respond to a first contact attempt. In many cases, their response rate is one and a half times the average, and, overall, black women reply about a quarter more often that other women."
"White men get more responses. Whatever it is, white males just get more replies from almost every group. We were careful to pre-select our data pool so that physical attractiveness (as measured by our site picture-rating utility) was roughly even across all the race/gender slices. For guys, we did likewise with height."
"White women prefer white men to the exclusion of everyone else—and Asian and Hispanic women prefer them even more exclusively. These three types of women only respond well to white men. More significantly, these groups’ reply rates to non-whites is terrible. Asian women write back non-white males at 21.9%, Hispanic women at 22.9%, and white women at 23.0%. It’s here where things get interesting, for white women in particular. If you look at the match-by-race table before this one, the “should-look-like” one, you see that white women have an above-average compatibility with almost every group. Yet they only reply well to guys who look like them. There’s more data on this towards the end of the post."
"Men don’t write black women back. Or rather, they write them back far less often than they should. Black women reply the most, yet get by far the fewest replies. Essentially every race—including other blacks—singles them out for the cold shoulder."
"White guys respond less overall. The average reply rate of non-white males is 48.1%, while white guys’ is only 40.5%. Basically, they write back about 20% less often. It’s ironic that white guys are worst responders, because as we saw above they in turn get the most replies. That has apparently made them very self-absorbed."