The 2nd constituency of the Pyrénées-Atlantiques (French: deuxième circonscription des Pyrénées-Atlantiques) is a French legislative constituency in the Pyrénées-Atlantiques département. Like the other 576 French constituencies, it elects one MP using the first past the post election system with a run-off.
François Bayrou, the leader of MoDem, had held the seat from 1988 until his defeat by the Socialist Party's Nathalie Chabanne in 2012.
The 2012 election in this constituency attracted media interest as long-serving MP, national political figure and three-time presidential candidate François Bayrou appeared to be facing unprecedented difficulty. Until 2002, the mainstream right had not stood a candidate against him, and in 2007 the candidate of the Union for a Popular Movement had withdrawn in his favour in the second round. Following Bayrou's personal endorsement of François Hollande for the second round of the 2012 presidential election, however, the UMP withdrew its earlier promise not to stand a candidate against him. The UMP considered standing Frédéric Nihous, a former presidential candidate for a small hunters' party, as its candidate, but Nihous declined, saying he would support the UMP without being its candidate. Local party member Éric Saubatte was chosen instead. Bayrou also had to contend with a Socialist opponent, despite there having been talk in the Socialist Party of not standing a candidate in his constituency, as a gesture of acknowledgment for his endorsement of Hollande.
Under French electoral law, in legislative elections, a third-placed candidate may advance to the second round if he or she obtains the votes of at least 12.5% of registered voters. This is what happened, as third-placed candidate Éric Saubatte (UMP) was able to take part in a three-way runoff vote.