John II of Isenburg-Limburg was Lord of Limburg an der Lahn and the last Count of Isenburg-Limburg from 1365 until 1406. He is sometimes designated John III to differentiate him from his non-ruling older half-brother John II (died before 1353). Gerlach V had pledged the Lordship of Limburg an der Lahn to the Archbishopric of Trier between 1344 and 1346. In 1374 Limburg’s imperial sovereignty also fell to Trier. After John's death without heirs in 1406, the House of Isenburg-Limburg was extinct. Limburg was then annexed by Trier. The Archbishop at the time was .