There are several places where you can find ribosomes, depending on their type. For instance, free ribosomes can be found floating freely in the cytoplasm of a cell. You can find more information here: http://www.iscid.org/encyclopedia/Riboso...

Ribosomes are found either dispersed randomly throughout the cytoplasm or attached to the surface of rough endoplasmic reticulum. They are often linked together in chains called polyribosomes or polysomes.