Microplastics (MPs) are plastic particles less than 5mm in size, and have recently become a global concern due to their toxic capabilities and pollution potential. Mosquitoes are leading cause of human deaths due to their disease vectoring capabilities, and their larvae have been shown to readily consume MPs, but little studies have attempted to quantify the effect of MP consumption on mosquitoes. Few studies on other insects have suggested MP consumption obstructs nutrition intake and affects immune functioning, but ingestion does not cause mortality. Here we investigated how MPs affect the basic fitness and physiology of mosquitoes. We tested the effects of ambient MP exposure on the mosquito Aedes aegypti by dosing their larval rearing water with either no MPs, 200 particles/mL, or 2000 particles/mL. Mosquitoes were placed in their respective treatments 1-day post hatching, and reared until adulthood. We measured adult body size and lipid contents, and recorded development time. There was no effect of MP exposure on body size for any of the concentrations, but mosquitoes in the high MP treatment had a significantly longer development time compared to zero MP exposure. These results show that microplastic consumption does affect mosquito physiology and opens the door for more research exploring the exact mechanisms MP consumption elicits for a reduced growth rate.