Ya'akov Katz (Hebrew: יעקב כ"ץ, 28 December 1906 – 21 December 1967) was an Israeli politician who served as a member of the Knesset for the Religious Torah Front and Poalei Agudat Yisrael between 1955 and 1967.

Born in Zolochiv in Galicia in Austria-Hungary (today in Ukraine, from 1919 to 1939 in Poland), Katz received a Haredi education, and joined Young Agudat Yisrael.

He made aliyah to Mandatory Palestine in 1934, and settled in Haifa, where he became secretary of the local branch of Poalei Agudat Yisrael.

He also served as director of the organisation's Immigrant Absorption Department for the north of the country.

The following year he became a member of its directorate (on which he remained until 1967) and deputy mayor, a position he held until 1959.