This article reports the findings of sociolinguistic research investigating the use of second-person singular pronouns in Costa Rica. The study was carried out onsite and involved 132 interviewees from all seven provinces of the country. These subjects reacted to scenarios in which they had to choose their preferred pronoun of use ("usted," "vos," or "tú") when engaging with a variety of categories of interlocutors. Subjects then commented on the reasons for their preference/usage. The pronoun "usted" ("Ud.") was overwhelmingly in evidence throughout the country, and the "vos" was also noticeably present in many cases. With both pronouns, context as well as other variables played a role in Spanish speakers' pronoun selection. The pronoun "tú" was an extremely distant third and did not appear at all in the speech for many interlocutors. Given the prevalent paradigm of teaching "tú" in U.S. Spanish language classrooms and the near absence of "vos," this study has important ramifications for Spanish instructors. Informing students of these patterns of pronoun use and including "vos" in the curriculum to some degree, particularly at higher levels, is recommended.