|Intro||Lord of Werle, then Lord of Werle-Parchim|
|Death||October 15, 1283|
John I, Lord of Werle-Parchim (c. 1245 – 15 October 1283), was from 1277 to 1281 to Lord of Werle and from 1281 to 1283 and to Lord of Werle-Parchim.
He was the eldest son of Nicholas I and Jutta of Anhalt.
After his father's death in 1277, he first reigned werle together with his brothers Henry I and Bernard I. In 1281, it was decided to divide Werle and John took over control of Werle-Parchim.
He was married with Sophia, the daughter of Count Günther of Lindow-Ruppin.
He died on 15 October 1283, and was buried in the Doberan Minster.
John's daughters are not mentioned in historic documents, only his sons
- Nicholas II, Lord of Werle, 1283-1316
- John II, Lord of Werle [-Güstrow], 1316-1337
- Gunter, Dean of Güstrow, and perhaps Magdeburg, died after 20 April 1310
- Henry, Dominican monk at Röbel Monastery, died after 17 March 1291
- Bernard, Dominican monk at Röbel Monastery, died after 24 August 1309
- Henning of Werle, died after 30 November 1311