Sydney Harry Curnow (16 December 1907 – 28 July 1986) was a South African cricketer who played in seven Test matches in the 1930–31 and 1931–32 seasons.

[2] His father was W. S. Curnow, a South African mining engineer, and his mother was a Miss Francis McAuliffe who came from Launceston, Tasmania.

Despite this modest record, he was picked for the South African tour to Australia and New Zealand in 1931–32, and decent scores in warm-up matches brought him back to the Test team for the first game of the five-match series.

[11] Dropped for the second Test, he came back into favour after an innings of 158 in a non-first-class game against a Victoria Country XI where, despite the doubtful calibre of the opposition bowling attack, the other South African front-line batsmen failed.

The South African team moved on from Australia to play matches in New Zealand, including two Tests, but Curnow was not picked for any of the games there.

After the tour to Australia and New Zealand, Curnow was a part-time and domestic-only cricketer, restricted to a few appearances each season always around the Christmas period.