Kristian Middelboe (24 March 1881 in Brunnby, Sweden – 20 May 1965) was a Danish amateur football (soccer) player and leader.

Playing in the defender position, he won a silver medal with the Danish national team in the 1908 Summer Olympics football tournament.

Kristian Middelboe played his club football with Kjøbenhavns Boldklub (KB), making his debut in 1898.

[2] He made his debut in the first Danish national team ever, the 9-0 win against the French B-team at the 1908 Olympics.

He did not leave his last administrative position in Danish sports, until he met the official age restriction in 1964.