Cornelis Johannes Pieter "Kees" Schalker (31 July 1890 – 13 January 1942) was a Dutch communist politician and resistance fighter against Nazi occupation.

From July 1933 to June 1937 he was a member of the Second Chamber of the Dutch Parliament, where he was his party's spokesman for agriculture and foreign policy.

In his position Schalker also defended the interests of German refugees from Nazi Germany and criticized the Dutch government's cooperation with the Gestapo.

At the VII World Congress of the Comintern in the summer of 1935 he was elected a candidate for the Executive Committee of the Communist International.

On 12 February 1944 he was shot in the Waalsdorpervlakte as part of German reprisals to Dutch resistance attacks in Rotterdam.