Nils Valentin Bergkvist or Nils Bergqvist (born 13 August 1900 in Södertälje– died ?) was a Swedish chess master. He shared first in the national tournament at Lund 1933, took 5th at Stockholm 1937 (Reuben Fine won), played a match with Salo Landau at Stockholm 1937, twice tied for 3rd-4th, with Ernst Larsson at Kalmar 1938 (Erik Lundin won), and with Allan Bergkvist at Stockholm 1938 (Gösta Stoltz won), tied for 2nd with Rudolf Spielmann, behind Gideon Ståhlberg, at Stockholm 1939 (Swedish Chess Championship), and won at Stockholm 1940.