The Panagopoula Tunnel (Greek: Σήραγγα Παναγοπούλας)[1] is a tunnel on the Corinth-Patras section of the A8 motorway.

The name comes from the namesake area of Panagopoula.

It consists of two separate sections, one which has a length of 4,018 m (Panagopoula 1)[2] used by vehicles travelling from Patras to Athens, and one which has a length of 3,182 m (Panagopoula 2) used by vehicles travelling from the opposite direction, from Athens to Patras.

Works began in 2008 along with the whole motorway, but they were halted in 2011.

[3] The 4 km tunnel is the longest road tunnel of the whole A8 and the third longest in Greece[4] It was opened to traffic in late February 2017, a month earlier than the rest of the motorway.