Jacob Walcher (May 7, 1887 – March 27, 1970) was a German communist politician and trade unionist.

Walcher was born in 1887 in the rural Swabia to a family of poor religious Protestant farmers and learned the profession of metal working.

He became a member of the German Metal Workers' Union and of the Social Democratic Party of Germany (SPD).

After World War I, he joined the newly founded Communist Party of Germany.

In the German Democratic Republic he was a member of the ruling Socialist Unity Party of Germany (SED).