In the Original Investigation titled “Consumption of Olive Oil and Diet Quality and Risk of Dementia-Related Death,”1 published May 6, 2024, there were data errors in the Table 1 row for number of participants in the Health Professionals Follow-up Study, there was a typographical error in the key for panel A of Figure 1, and there were errors in the hazard ratios listed in the text next to the forest plot in panel A of Figure 2. These discrepancies did not affect the results and conclusions of this analysis. This article has been corrected.1