Although English-as-a-second-language (ESL) programs for matriculated students have been a presence in U.S. higher education since the 1940s, little has been documented in the literature concerning ESL courses, ESL placement tests, and the procedures in which incoming students are placed into appropriate classes.The present study takes three approaches to explore the characteristics of ESL programs for matriculated students, with the purposes of drawing a clearer picture of such programs and preparing for a further exploration of validity issues that arise when using standardized English proficiency tests, such as the "TOEFL"® test, to assist with ESL placement decisions. We reviewed the websites of 152 postsecondary institutions, obtained information from 80 institutions through an online survey, and interviewed representatives of 24 ESL programs for matriculated students. Analyses of these three sources of data revealed that ESL programs for matriculated students exist in more than half of colleges and universities sampled, that they provide a wide range of ESL courses focusing on different language skills, and that these programs make use of a variety of placement tests and procedures. We summarize these different placement procedures using a general model, highlight issues that need further investigations, and conclude with key findings and limitations.