Thomas Eisfeld (born 18 January 1993 in Finsterwalde) is a German Croatian footballer who plays for Arsenal as an attacking midfielder.
He played for SV Quitt Ankum and VfL Osnabrück before joining the youth academy at Borussia Dortmund.
Eisfeld is a product of Borussia Dortmund youth academy. He faced a cruciate ligament injury in 2009 which was described as a 'career-threatening' injury by his coaches. He scored six goals in 12 matches for the Dortmund U-19 team in the 2011–12 season.
He signed for Arsenal on 31 January 2012 for a reported fee of £420,000. This was due as compensation for training him as an academy player. Arsène Wenger describes Eisfeld as having "the attitude and technical ability to be a valuable addition to our squad."