•School meal participation dropped 46% during COVID-19 school closures in California.•Districts had valuable but partial meal access information during school closures.•Number of school meal sites dropped 32% during COVID-19 school closures.•School meal sites tended to be placed in priority population areas.•Density of school meal sites was disproportional to density of populations in need. The National School Lunch and School Breakfast programs are a nutrition safety net for millions of children in the United States, particularly children in households with lower incomes. During Spring 2020 COVID-19 school closures, schools served school meals through the Summer Meal Programs. Despite efforts to increase access, meal participation declined and food insecurity increased. We aimed to (1) describe meal program features as communicated in low-income California school districts’ on-line resources (2) examine associations between meal program features and change in meal participation between May 2019 and May 2020 and (3) evaluate equity by describing meal site coverage and placement relative to the size of priority populations. Data from district online resources and meal reimbursement claims were collected for a stratified, random sample of 190 CalFresh Healthy Living-eligible districts. Linear regression was used to examine associations between district meal program features and percent change in meal participation. Meal site location and density were examined in relation to the size of priority populations. In May 2020, compared to May 2019, total meals served decreased by a median 46%. There were gaps in the information provided in district online resources and low variation in measured district meal program features. These features explained little of the variation in the percent change in meal participation. A greater proportion of meal sites were placed in areas with larger priority populations, yet the density of sites was not proportionate to the priority populations’ sizes. Findings show actionable areas for improving meal access during school closures.