1430

Year 1430 (MCDXXX) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar.

January–December

 * January 7 – Philip the Good, Duke of Burgundy, marries Isabella of Portugal.
 * January 10 – Philip the Good founds the Order of the Golden Fleece.
 * March 29 – The Ottoman Empire, under Murad II, captures Thessalonica after an eight-year siege.
 * May 14 – The French first attempt to relieve the Siege of Compiègne.
 * May 23 – Joan of Arc is captured by the Burgundians, while leading an army to relieve Compiègne.
 * June 14 – William Waynflete becomes vicar of Skendleby, Lincolnshire.
 * July 11 – Battle of Trnava: The Hussites defeat the Hungarian-Moravian-Serbian army.
 * October 27 – Švitrigaila succeeds his cousin Vytautas as ruler of Lithuania.

Date unknown

 * With the surrender of Chalandritsa and the citadel of Patras to the Byzantine Despotate of the Morea, the Principality of Achaea comes to an end.
 * Bratislava Castle is converted to a fortress under Sigismund of Luxemburg.
 * Optical methods are first used in the creation of art.

Births

 * March 10 – Oliviero Carafa, Italian Catholic cardinal (d. 1511)
 * March 23 – Margaret of Anjou, queen of Henry VI of England (d. 1482)
 * June 13 – Beatrice, Duchess of Viseu, Portuguese infante (d. 1506)
 * June 27 – Henry Holland, 3rd Duke of Exeter, Lancastrian leader during the English Wars of the Roses (d. 1475)
 * October 16 – King James II of Scotland (d. 1460) and his twin Alexander Stewart, Duke of Rothesay (d. 1430)
 * October 28 – Richard West, 7th Baron De La Warr, English soldier, son of Reginald West (d. 1475)
 * November 11 – Jošt of Rožmberk, Bishop of Breslau, Grand Prior of the Order of St. John (d. 1467)
 * date unknown
 * Hosokawa Katsumoto, Japanese warlord
 * Barbara von Ottenheim, German alleged witch and sculpture model (d. 1484)
 * Isabel Bras Williamson, Scottish merchant (d. 1493)
 * Joana de Castre, Catalan noble (d. 1480)
 * probable – Heinrich Kramer, German churchman and inquisitor (d. 1505)
 * approximate – Clara Hätzlerin, German scribe (d. 1476)

Deaths

 * January 5 – Philippa of England, queen consort of Denmark, Norway and Sweden (b. 1394)
 * January 29 or 1427 – Andrei Rublev, Russian iconographer (possible date; b. 1360)
 * April 18 – John III, Count of Nassau-Siegen, German count
 * August 4 – Philip I, Duke of Brabant (b. 1404)
 * August 18 – Thomas de Ros, 8th Baron de Ros, English soldier and politician (b. 1406)
 * October 27 – Vytautas, Grand Prince of Lithuania (b. 1352)
 * date unknown
 * Thomas FitzAlan, English noble
 * Christine de Pizan, Italian proto-feminist writer (b. 1364)