Athens B (Athens Beta; ) was a parliamentary constituency in Attica represented in the Hellenic Parliament. It covered a large part of urban area of Athens outside the Municipality of Athens, which forms the Athens A constituency. It was established in 1958, to separate the working-class districts from central Athens and reduce the electoral power of the then United Democratic Left, and was abolished in 2018.
As of September 2015, with 1.4 million registered voters, Athens B elected 44 Members of Parliament (MPs) by reinforced proportional representation and was the largest constituency in Greece. For this reason it was broken up in December 2018 into Athens B1 (North), Athens B2 (West), and Athens B3 (South).
The following 44 MPs were elected in the September 2015 legislative election:
The following MPs had been elected in the January 2015 legislative election: