Sergi Palencia Hurtado (born 23 March 1996) is a Spanish professional footballer who plays as a right back for French club AS Saint-Étienne.
Born in Badalona, Barcelona, Catalonia, Palencia started playing football for hometown club CF Badalona at the age of 8, moving to FC Barcelona's youth system, La Masia, in 2006. In 2013, he was compared to Bayern Munich full back Philipp Lahm by Spanish newspaper Mundo Deportivo.
On 29 March 2015, while still a youth, he was called up to the reserves for a Segunda División match against CD Tenerife, and played his first match as a professional hours later, starting in a 1–1 home draw. He and Álex Grimaldo were sent off on 25 April 2015 in a 2–1 win over SD Ponferradina at the Mini Estadi. Palencia played eleven matches in a season which saw his team relegated to Segunda División B, scoring his first goal on 31 May in a 2–5 loss to CD Leganés at the Mini Estadi.