John I (died c. 881) was the Abbot of Farfa from 871/2.
He made a few property acquisitions, but his abbacy comes at the start of an obscure period in Farfa's history.
[1] He received a confirmation from the Emperor Louis II of all of Farfa's lands on 27 May 872 and another from Charles the Bald in 875.
[2] Charles confirmed the abbey's freedom from taxation and secular jurisdiction and gave its abbots jurisdiction in suits involving subjects of the monastery's lands.
[3]