The Organising Committee of the 4th Conference on Differential Equtions and Control Theory have the pleasure of inviting you to participate in DECT 2019 to be held on the 23-26 September 2019 in Kołobrzeg, Poland. The first edition of the Conference was held in Kharkiv, Ukraine in 2016 and was organised jointly by V. N. Karazin Kharkiv National University and University of Szczecin and since then it is an annual opportunity to exchange knowledge and the latest research trends in Differential Equtions and Control Theory for researchers from all over Europe. The second edition of the Conference was held in Świnoujście, Poland in 2017. The third edition of the Conference came again in Kharkiv, Ukraine in 2018.