Aharon Yosef "Yossi" Daitsh (also spelled Deutch or Deitch (Hebrew: אהרן יוסף דייטש; born 1968) is an Israeli politician who served as deputy mayor of Jerusalem, as a member of the Shlomei Emunim faction of the Agudat Yisrael party.

[citation needed] After graduating from Talmud Torah (the Haredi equivalent of primary school), he studied in the Slonim Yeshivah in Mea Shearim, "Bet Avraham".

[citation needed] After his marriage, Daitsh learnt half-time in Kollel, while in the other half, he served as secretary in the Slonim Yeshivah.

After the municipal elections in 2008, Daitsh was appointed to the sanitation portfolio, and charged with heading the project of road and building renewal in the Haredi neighborhoods, Malchei Yisrael, Zichron Moshe, Romema, Habucharim, Kerem Abraham, and Mekor Baruch.

As part of his activities in the housing committee, Daitsh put forward projects for the expansion of the neighborhoods beyond the green line, the improvement of earthquake regulations, and also plans for a tourism center and increase of security in Har Hazeisim.

In 2016, Daitsh, together with fellow Haredi council member Shlomo Rosen stein, initiated the project "Olim l'Yerushalaim", which since has taken place every year.

After incumbent mayor Nir Barkat's announcement in early 2018 that he would not run for a third term, much speculation arose around Daitsh's possible run to succeed him; as the senior member of the UTJ party in Jerusalem, and given his long experience and impressive resume, he was viewed by many pundits as the only Haredi candidate who could win the election.

[2] However, Daitsh delayed launching his campaign, due to his desire to secure the support of all the Haredi parties in the capital before proceeding.

[3] Daitsh received the support of the Chardali party Meuchadim of Aryeh King and Eli Yishai,[4] and was endorsed by former mayor Uri Lupolianski[5] and Deputy Mayor Meir Turgeman,[6] and by several prominent Dati Leumi rabbis in the capital; but on election day (October 30, 2018), he finished fourth out of four major candidates, earning 17.0% of the vote (Lion took 32.8%, Berkovitch 29.4%, Elkin 20.0%).