What size pot did you start them in? If one of those little 1 x 1 inch cubes, probably yes. If you re-pot, bury all but the top two or three leaves in the soil - tomatoes root along their stems so you will end up with a healthy, more vigorous plant.
It's a little early to plant outside in your zone. Go to the "Goodies" forum and look for the planting calendar. Put in your zip code and that will give you a good idea of when you can plant out. When you do plant them outside, once again, bury the entire stem except for the first couple leaf sets.
Daisy
