After a Council of State meeting at the Presidential Villa on Thursday, it was decided that the general elections coming up later this month will go ahead as planned.
Col. Sambo Dasuki, National Security Adviser had called for a delay to allow more time for voter card distribution.
The country is also facing mounting attacks from the Boko Haram militant group.
Imo state governor, Rochas Okorocha, however, said election officials had insisted they were “very ready”.
The council of state – comprises the main presidential candidates, ex-leaders, state governors and election officials – met in the capital, Abuja, on Thursday to discuss the election.
“No decision was taken to change the date. The date remains February 14. INEC (the Independent National Electoral Commission) reassured us that they are prepared to conduct the election,” Mr Okorocha told journalists.
Several of Nigeria’s smaller opposition parties, as well as national security adviser Sambo Dasuki, had been urging a postponement of the poll.
But Mr Buhari’s APC party opposed the delay.
APC campaign media head Malam Garba Shehu said a delay would have caused a crisis and “made Nigeria the laughing stock of the civilised world”, in a statement seen by Reuters.
Polling will not be conducted in Boko Haram-controlled areas. Some 69 million Nigerians out of a population of 177 million are eligable to vote.