Cyril "Cec" Blinkhorn was an Australian rugby league footballer who played in the 1910s and 1920s. He played in the NSWRFL premiership for the North Sydney and South Sydney clubs, and also represented New South Wales and Australia. He primarily played on the wing and has been named amongst the nation's finest footballers of the 20th century. Blinkhorn was considered a real flying machine with a devastating fend-off

Although born in Abercrombie St, Redfern, New South Wales, the middle of Souths territory, Blinkhorn grew up a Norths supporter after moving to Chatswood. He was graded to Norths in 1914 and made his debut against South Sydney on 15 August, 1914 at North Sydney Oval, and for five years he was the team's leading try-scorer. With Horder, Blinkhorn formed one of the finest wing combinations the game has seen, and their efforts helped give Norths two premierships and two City Cups between 1920 and 1922. Blinkhorn spent the 1919 season at Souths, where he met fellow winger, Harold Horder. In 1920, Horder and Blinkhorn moved to Norths, where they remained until 1923. With Harold Horder, Blinkhorn formed one of the finest wing combinations the game has seen, and their efforts helped give Norths two premierships and two City Cups between 1920 and 1922.

Blinkhorn was a member of the premiership winning Norths teams of 1921, where the team went through undefeated, and 1922 when Norths met Glebe in the Grand final. Blinkhorn scored two tries. Blinkhorn was first selected to play for Australia in 1921. On that 1921–22 Kangaroo tour of Great Britain, he scored a record 39 tries in 29 matches and played in three Tests. This record still stands as the most tries scored on a Kangaroo tour and will most likely never be beaten. He played one further Test against England in 1924. Cec Blinkhorn is Kangaroo No. 116.

At the end of 1923, he and Horder returned to Souths, where Blinkhorn played one more season before serving the club as a committeeman for many years. When he crossed back over the harbour and rejoined the Shoremen in 1920 he brought the great Harold Horder with him, the pair reputedly recruited by Norths' secretary Lorne Dargan via the incentive of a few pounds and a new suit. Later, he moved to Sydney's west and helped establish the Colyton JRLFC, a club which has produced Tony Butterfield, the Liddiard brothers and Craig Gower.

Four of Cec's nephews all made appearances for Norths. Clarrie Blinkhorn played in the 1930s. His brothers Jack (61 games 1956–659) and Harold (74 games 1956–62) played in the forwards in the 1950s and 1960s, while Douglas was a three-quarter who made 11 first-grade appearances in 1961–62. Grandson Geoff 'Bullet' Blinkhorn played for the North Sydney Bears from 1985-88, with 22 games in total.