For Manhattan it is located at a shopping mall at 116 street and the East River. Take the M15 bus on 1st Avenue and 116 street and walk to towards the East River. Your best bet is to Google the Costco at 116th street from your address and google maps and directions will show you exactly how to get there From your location using pubic transportation.
Or take tje 116 to 1st ave and walk to 117 st then walk to costco
Easiest way would be the M15 or M15-SBS to 116th st stop, which lets you out closer to 117th st, then just walk east towards the river
Use Google Maps to get directions for buses and trains that do stop near Costco on 117th Street. #6 train and the M15 bus.
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