Mathias Walther (born 11 April 1972) is a retired Swiss football midfielder and later manager.
He was called up to their first team many times in their 1990–91 season under head coach Ernst August Künnecke.
He played his domestic league debut for the club in the home game in the St. Jakob Stadium on 22 December 1990 as Basel won 6–2 against Schaffhausen.
During his three seasons with the team Walther played a total of 22 games for Basel scoring one goal.
On 10 April 2018 he sacked head coach Murat Yakin and took over as caretaker manager himself for a short period.