St. Mark's Church (Sankt Markus Kirke) is a church at the end of Julius Thomsens Plads in the Frederiksberg district of Copenhagen, Denmark.

The church was built from 1900 to 1902 to the design of Carl Lendorf. It was consecrated on 9 November 1902 at a ceremony attended by Bishop Kultus Minister J. C. Christensen.

The church is a cruciform church built in red brick with inspiration from Byzantine and Romanesque architecture.

Over the main portal there is a mosaic by Oscar Willerup depicting Saint Mark the Evangelist with a quill and a winged lion, his symbol.