The official seal of PLMar bears the inscriptions Pamantasan ng Lungsod ng Marikina and 2003 which refers to the year of its founding.

 The mountains represent the Cordillera and Sierra Madre Mountain ranges between which the Marikina Valley being traversed by the Marikina River.

 The rising sun points to the eastern location of marina while the sun’s rays represent the 16 barangays of the city.

 The gear symbolizes its industries, while the shoe last, the traditional cottage industry of the city, the shoe industry.

 The torch represents the noble ideals for human development for a better quality of life.

 The bamboo emphasizes the resilience of the Marikina people after experiencing a harmful or inopportune past.

 The open book represents the school as the open vessel in the never-ending quest for education, a tool for competence and advancement in life.