In the course of the COVID-19 pandemic, education policy debates have thrust a heightened focus on the provision of adequate school resources and on educator well-being and turnover, concerns particularly critical for school districts that serve large shares of economically disadvantaged students. In this article, we investigate voter and parent support for school spending initiatives in Missouri by analyzing data from two representative statewide surveys, one of the state's voters and one of the state's parents, focusing on total school spending and spending on teacher salaries. Missouri presents an especially salient setting in which to examine issues of equity in school spending, with below-average school spending and bottom-decile average teacher salaries. In this context, we investigate longstanding predictors of school spending support, including political ideology, alongside new hypotheses, including those pertaining to regional spending inequality and differences between voter and parent constituencies. While political ideology predicted school spending and teacher salary preferences, it did so more strongly for voters than for parents, an important consideration amid heightened political tensions in policy debates. Parent preferences, on the other hand, were more likely to be predicted by opinions of local and statewide school quality. Both voters and parents indicated sensitivity to regional spending inequality with respect to total school spending but not with respect to teacher salaries. Collectively, these findings may inform policymaking efforts in Missouri and similar prevailingly conservative contexts to use constituent preferences to guide legislative efforts.