|Ab urbe condita||1954|
|Balinese saka calendar||1122–1123|
|English Regnal year||2 Joh. 1 – 3 Joh. 1|
|Chinese calendar||庚申年 (Metal Monkey)|
3897 or 3837
— to —
辛酉年 (Metal Rooster)
3898 or 3838
|- Vikram Samvat||1257–1258|
|- Shaka Samvat||1122–1123|
|- Kali Yuga||4301–4302|
|Japanese calendar||Shōji 3 / Kennin 1|
|Minguo calendar||711 before ROC|
|Thai solar calendar||1743–1744|
1327 or 946 or 174
— to —
1328 or 947 or 175
|Wikimedia Commons has media related to 1201.|
- July 31 – John Komnenos the Fat attempts to usurp the throne of the Byzantine Empire; he is overthrown and decapitated by the end of the day.
- John, King of England, puts an embargo on wheat exported to Flanders, in an attempt to force an allegiance between the states. He also puts a levy of a fifteenth on the value of cargo exported to France, and disallows the export of wool to France without a special license. The levies are enforced in each port by at least six men, including one churchman and one knight. John also affirms this year that judgements made by the court of Westminster are as valid as those made "before the king himself or his chief justice".
- The town of Riga is chartered as a city by Albert of Buxhoeveden, Bishop of Livonia, who had landed on the site with 1,500 crusaders earlier in the year.
- Boniface, Marquess of Montferrat is elected leader of the Fourth Crusade, after the death of Theobald III, Count of Champagne.
- Pope Innocent III supports Otto IV as Holy Roman Emperor, against the rival Emperor, Philip of Swabia.
- February 18 – Nasir al-Din al-Tusi, Persian scientist and writer (d. 1274)
- May 30 – Theobald of Navarre (Theobald IV, Count of Champagne) (d. 1253)
- August 9 – Arnold Fitz Thedmar, English chronicler (d. 1274)
- October 9 – Robert de Sorbon, French theologian and founder of the Sorbonne (d. 1274)
- King Ladislaus III of Hungary (d. 1205)
- Danylo, first king of Galicia–Volhynia (d. 1264)
- Alix, Duchess of Brittany (d. 1221)
- Warren, W. L. (1961). King John. University of California Press. pp. 122–31.