The decision was taken at a joint meeting of election officials from both states held here.
Elections in the two constituencies in Meghalaya would be held on April 9, while the first phase of polling in Assam would begin on April 7.
The two states share an inter-state border of about 800 kms.
"This meeting was called to sort out all issues related to conducting peaceful, free and fair elections in both states," Meghalaya Chief Electoral Officer (CEO) Prashant Naik told reporters after the meeting.
With Assam also going for polls, he said that state also required some coordination to manage the dry days and movement of polling parties and maintaining law and order.
"All these have been discussed and we decided to extend full cooperation to each other," the CEO said.
Assam Additional Chief Election Officer R C Jain said the meeting was regarding maintenance of law and order during elections in both the states.
