Guwahati-Dibrugarh Shatabdi Express was a Shatabdi Express category type of service belonging to Northeast Frontier Railway zone that ran between Guwahati and Dibrugarh in India.

It operated as train number 12085 from Guwahati to Dibrugarh and as train number 12086 in the reverse direction serving the states of Assam and Nagaland.

The 12085/ 86 Guwahati Dibrugarh Shatabdi Express had 6 AC Chair Car and 2 End on Generator coaches.

The 12085 / 12086 Guwahati Dibrugarh Shatabdi Express covered the distance of 506 kilometres in 09 hours 05 mins in both directions.

Being a Shatabdi class train, it returned to its originating station Dibrugarh on next day and also shared rakes with 12087/88 Naharlagun−Guwahati Shatabdi Express