Thessaloniki Alpha (Greek: εκλογική περιφέρεια Α΄ Θεσσαλονίκης) is an electoral constituency of the Hellenic Parliament.

[1] With an electorate of 531,732 eligible voters (as of 2019) in the urban area of Thessaloniki, Central Macedonia, it elects sixteen members of parliament.

The constituency was formed in 1958, when the former Thessaloniki constituency was divided in two, with the remaining municipalities of the Thessaloniki regional unit (until 2010, Prefecture) constituting Thessaloniki B.

The following sixteen MPs have been elected in the Greek legislative election, September 2015: The following sixteen MPs had been elected in the Greek legislative election, January 2015

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