We report the effect of porous poly(lactic-co-glycolic acid) (PLGA) and PLGA/multiwalled carbon nanotubes (MWCNTs) scaffold materials prepared using both electrospinning and colloidal templating approaches on the cell growth. The viability of rat fibroblast cells cultured on these two types of scaffolds was assessed using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay. The cell morphology was observed using scanning electron microscopy. We show that the incorporation of MWCNTs in PLGA scaffolds prepared using both methods tends to significantly promote fibroblast attachment, spreading, and proliferation when compared with PLGA fibrous mats and macroporous PLGA films without MWCNTs. The porous nature of the fibrous mats and macroporous polymer films with a similar composition does not appear to remarkably influence the cell attachment and proliferation. Electrospun porous fibrous mats show better cell proliferation and growth than macroporous films with similar composition at longer culture times. The fabricated porous PLGA/MWCNTs composite membranes could be further developed as tissue engineering scaffolds for applications in regenerative medicine.