Do midgets have normal size genitalia?

It depends on the organ, the type of dwarfism the individual is afflicted with (some cause normal-sized organs but abnormally-sized bones, which can be a serious medical problem), and other factors like whether hormone treatments are being used. For the most common type of dwarfism, most of the organs are slightly smaller, but the heart, brain, liver and lungs tend to stay the same size. Kidneys spontaneously growing abnormally large in certain types of dwarfs is an uncommon but known condition.

If you're asking about the organ you can't identify on broadcast television, yes. Generally midgets will have the usual range of penile sizes, with a perhaps half-inch lower average. Bear in mind that, by way of analogy, gorillas (several times larger than us) have average 1-inch penis size at full erection, whereas bonobo chimps can have 16-inchers with no difficulty.