We examine the degree to which ethnic diversity in social networks relates to the frequency of interethnic romantic relationships for 318 college students. In a multi-nomial logit, we find that the odds of having an interethnic relationship once or twice, versus never, increase significantly if the respondent has a relatively ethnically diverse friendship network, is male, and supports interethnic dating. The odds of having an interethnic relationship often, versus once or twice, are significantly higher for persons of color and when the friends of the respondent's parents are relatively diverse ethnically. Findings from open-ended data also provide support for a social network perspective, and point to the processes by which networks, gender, and ethnicity shape interethnic courtship.