Despite increasing attention being focused on the importance of teacher diversity in recent years, the federal government does not centrally collect district- or school-level data on teacher race and ethnicity. This means that responsibility for the collection and promulgation of teacher diversity data falls to individual states and/or districts. Based on our survey of state education agencies in 50 states and the District of Columbia, conducted in late 2017, we provide a comprehensive summary of whether these data are collected by states, and whether and how they are made available to the public. We find that six states--Alabama, Delaware, Maine, Vermont, Virginia and West Virginia--do not collect any district- or school-level data on teacher race and ethnicity. Two states, Nevada and North Carolina, collect only district-level data. In addition, of the 43 states that do collect school-level data, 38 make these data reasonably available to the public, and only 17 do so on their websites. In other words, roughly 1 in 4 states either does not collect or does not make public school-level teacher diversity data, and only about 1 in 3 makes these detailed data available without a request. We conclude with recommendations that all states collect school-level data on teacher race and ethnicity and post the data on their websites. We also recommend that the U.S. Department of Education begin centralized collection of these data as part of its Civil Rights Data Collection.