Alexander Hartmann Bah (born 9 December 1997) is a Danish professional footballer who plays as a right-back for Primeira Liga club Benfica and the Denmark national team. After coming through Næsby's youth academy, he was promoted to the first team in 2016, and later represented fellow Danish side HB Køge and spent two years with SønderjyskE in Danish Superliga. In January 2021, Bah joined Slavia Prague, where he won the Czech First League and Czech Cup in 2021 and was named the Czech First League's Defender of the Season in 2022, and then transferred to Benfica for €8 million. After representing Denmark at various youth levels, Bah was called up to the full international team for the first time in November 2020. He scored on his international debut against Sweden.