A portable modular seating assembly (PMSA 10) that is designed to be temporarily or permanently located on a sport field such as a soccer field. The PMSA (10) is comprised of a left structure (12), a right structure (34), a front structure (60), an inner reinforced panel 80 and a central support structure (96). The front structure (60) is attached to the front edges of the left structure (12) and the right structure (34). Between the two structures (12,34) is attached a set of stairs (82). The stairs are bordered by a passage (87) that is attached between the two sets of stairs (82). The PMSA (10) can also be designed to incorporate an indicia viewing structure (110) that can include a removably attached tarp (134) that is attached during periods of inclement weather or bright sunlight.