The governorship elections in the two states take place in September and November.
The commission announced the date in its bulletin on Tuesday.
It said the exercise would run till June 26, while June 27 would be dedicated for conclusion of claims and objections on the registration in the two states.
It added that notice of activities on the Edo election would be released on Wednesday.
The News Agency of Nigeria (NAN) reports that section 30(1) of the Electoral Act 2010 (as amended) provides that the INEC shall give the notice of a governorship election not later than 90 days before the election.
The commission also stated that it would conclude the Nasarawa/Toto Federal Constituency election on Wednesday.
The exercise was conducted on Saturday but declared inconclusive due to reported cases of over-voting in some units.
