Many K-12 brick-and-mortar public schools now grant students the option of taking some of their courses online. Yet, a scant academic literature probes where online course choice exists and why it is utilized. We partnered with a market research firm to solicit 450 responses from a nationally representative group of American parents of public school-educated children to begin to understand the predictors of districts adopting course choice, disparities in access, and why families utilize course choice. Overall, there were no clear intrastate predictors of which districts provide parents the option to avail online course choice. Among several options provided, respondents emphasized the importance of scheduling flexibility or simply believing that their child would learn more in their decision to utilize online course choice.