Madelia may refer to:

• Madelia (horse), a French Thoroughbred racehorse
• Madelia, Minnesota, United States
• Madelia Township, Watonwan County, Minnesota, United States

• Geisa Arcanjo
• Geisa Coutinho
• Geisa Muniz Countinho
• Geisarina
• Geisbach
• Geise
• Geisecke
• Geiselbach (Kahl)
• Geisel (disambiguation)
• Geiseler
• GEISEL Ernesto
• Geisel Library (Saint Anselm College)
• Geisel medical school
• Geiseloceros
• Geisel (river)
• Geisel school
• Geiseltalsee
• Geisenbrunn
• Geisenfeld Abbey
• Geisenfeld convent
• Geisenheim Alumni Association
• Geisenheimer
• Geisenhof
• G. Eisenstein
• Geisental Formation