This document is the 2018 annual report and plan of the Illinois Longitudinal Data System (ILDS), approved by the ILDS Governing Board. It summarizes ILDS governance activities in fiscal year 2018 and outlines priorities and budget for fiscal year 2019. Key activities included expanding the centralized demographic dataset and tools for analyzing education and workforce outcomes. Fiscal year 2019 priorities include further data integration, promoting external research access, and supporting P-20 education workforce initiatives. The report also benchmarks ILDS progress against state requirements for a longitudinal education data system.