Karjakin married Galiya Kamalova, secretary of the Moscow chess federation, in May 2014.
They have two sons, one born in late 2015 and the other born in 2017.
He was previously married since 2009 to Ukrainian chess player Kateryna Dolzhikova.

On 25 July 2009, by the decree of the President of Russia Dmitry Medvedev, Karjakin adopted Russian citizenship.
Later that year he transferred chess federations from Ukraine to Russia, in order to get sponsorship and better coaching.
He has lived in Moscow since 2009.

An ethnic Russian, Karjakin considers himself Russian rather than Ukrainian, and supports the 2014 Russian annexation of Crimea (from Ukraine) and Vladimir Putin.
He is Orthodox Christian.

In 2013 he graduated from the Russian State Social University with a degree in social pedagogy.
Karjakin married Galiya Kamalova, secretary of the Moscow chess federation, in May 2014. They have two sons, one born in late 2015 and the other born in 2017. He was previously married since 2009 to Ukrainian chess player Kateryna Dolzhikova.
On 25 July 2009, by the decree of the President of Russia Dmitry Medvedev, Karjakin adopted Russian citizenship. Later that year he transferred chess federations from Ukraine to Russia, in order to get sponsorship and better coaching. He has lived in Moscow since 2009.
An ethnic Russian, Karjakin considers himself Russian rather than Ukrainian, and supports the 2014 Russian annexation of Crimea (from Ukraine) and Vladimir Putin. He is Orthodox Christian.
In 2013 he graduated from the Russian State Social University with a degree in social pedagogy.
Sergey Karjakin