Meider may refer to:
- Hans Meidner (1914–2001), South African plant physiologist
- Ludwig Meidner (1884–1966), a Jewish German expressionist painter and printmaker
- Else Meidner, née Meyer (1901–1987), a Jewish German painter, wife of Ludwig Meidner
- Rudolf Alfred Meidner (1914–2005), a Jewish German-Swedish economist
- Rehn–Meidner Model, an economic model developed in 1951
- Rehn-Meidner Macroeconomics to Neo-liberalism