Background: School-level implementation of district-level local wellness policies (LWPs) is needed to create school environments that promote nutrition and physical activity (PA). Disparities in classroom-specific LWPs implementation were examined. Methods: administrator survey (N = 756 schools; 24/24 districts) included 6 classrooms LWP best-practice items (fully/not fully implemented: restricting food celebrations or rewards, incorporating PA breaks or integrating PA in curricula, restricting withholding or using PA as punishment). A sum score (alpha = .71; elementary and middle/high examined separately) was used to examine associations with student body income (free-and-reduced priced meals (FARMS): [less than or equal to] 40%, 41-75%, [greater than or equal to] 75%), race/ethnicity, and school location (rural/urban/suburban), accounting for district-level clustering, with moderation examined. Results: Classroom implementation scores were: elementary = 3.1 ± 1.8 (range: 0-6/6 items) and middle/high = 2.3 ± 1.6 (range:0-5/5 items). Among elementary and middle/high schools, 65% and 55% had >40% FARMS, 39% and 46% had [greater than or equal to] 50% white student body, and 24% and 23% were urban, respectively. Elementary schools with >40% of FARMS-eligible students and middle/high schools with <25% white students reported implementing fewer items. Location was not associated with classroom practices nor was moderation observed. Conclusions: Disparities in classroom-specific LWP best practices implementation were observed by income and race/ethnicity. Tailored support may be needed to improve classroom LWP implementation in schools serving low-income students.