The Western Line School District (WLSD) is a public school district based in the community of Avon, Mississippi (USA). In addition to Avon, the district serves the town of Metcalfe, a small portion of Greenville, as well as the unincorporated communities of Glen Allan and Winterville in Washington County. A small portion of northwestern Issaquena County lies within the district, including a section of Grace. It also serves Wayside. The district was established in 1957.