The 2018 Russian presidential election will take place on 18 March 2018.
The first round will be held on Sunday 18 March 2018. If in the first round no candidate attains an absolute majority of the votes (more than half), then according to the law, a second round will take place exactly three weeks later, on 8 April 2018.
On 6 December 2017, incumbent President Vladimir Putin announced that he would seek reelection for a second consecutive term and fourth term overall. Putin is widely expected to win, and has consistently scored higher than 40%, and often much higher, in opinion polls since the last presidential election.
Sources and Further Reading
Russia election: Who are Vladimir Putin’s challengers?
http://www.dw.com/en/russia-election-who-are-vladimir-putins-challengers/a-42512167
Russia election 2018: A field of puppet candidates, but Putin pulls the strings