Konstantinos Nikolopoulos may refer to:
Konstantinos Nikolopoulos (composer) (1786–1841), Greek composer Konstantinos Nikolopoulos (fencer) (1890–1980), Greek Olympic fencer, mayor of Athens, 1951–1955 Konstantinos Nikolopoulos (footballer, born 1993), Greek footballer Konstantinos Nikolopoulos (footballer, born 2002), Greek footballer Konstantinos Nikolopoulos (water polo), Greek Olympic water polo player Konstantinos Nikolopoulos (neuroscientist), 2019 laureate in Blavatnik Awards