| John V, Margrave of Brandenburg-Salzwedel | |
| Noble Family: | House of Ascania |
| Father: | Herman, Margrave of Brandenburg-Salzwedel |
| Mother: | Anne of Austria |
| Spouse: | Catherine of Glogau |
| Birth Date: | 1302 |
Margrave John V of Brandenburg-Salzwedel, nicknamed "the Illustrious" (in Latin Illustris), (1302 - 26 March 1317) was Margrave and co-ruler of Brandenburg from 1308 until his death.
His parents were Margrave Hermann, "the Tall" of Brandenburg and Anne of Austria, a daughter of Emperor Albert I, Duke of Austria and King of Bohemia. John married Catherine (d. 1327), a daughter of Duke Henry III of Glogau and Sagan.
John V died in 1317. With his death, the Brandenburg-Salzwedel line of the House of Ascania died out.