Boris Sergeyevich Koltsov (Russian: Борис Сергеевич Кольцов; born 10 September 1988) is a Russian darts player currently playing in the Professional Darts Corporation. He qualified for the 2015 PDC World Darts Championship where he lost in the first round against Kevin Painter.

In September 2014, Koltsov reached the semi-finals of the WDF Europe Cup beating Jeffrey van Engdom, Remco van Eijden, Thomas Junghans, Daniel Larsson and Ross Montgomery along the way before losing to Darius Labanauskas 6–3. He also reached the last 16 of the Romanian Open.

Koltsov won the Russian Qualifying Event for the 2015 PDC World Championship and beat Haruki Muramatsu of Japan 4–2 in legs in the preliminary round. He squared his first round match with Kevin Painter at 1–1 in sets, but could not win another leg after this to be defeated 3–1. He teamed up with Aleksei Kadochnikov to represent Russia at the World Cup of Darts and they lost 5–1 to Australia in the first round. Koltsov's bid to reach the 2016 World Championship was ended at the semi-final stage by Aleksandr Oreshkin. He dominated the Eurasian Darts Tour in 2016 by winning four and losing in one final of the six events staged. Kolstov and Oreshkin were defeated 5–3 by the Netherlands in the opening round of the World Cup, with world number one Michael van Gerwen praising Kolstov's play afterwards.

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