  We present ROSAT observations and analysis of thirteen superbubbles in the
Large Magellanic Cloud. Eleven of these observations have not been previously
reported. We have studied the X-ray morphology of the superbubbles, and have
extracted and analyzed their X-ray spectra. Diffuse X-ray emission is detected
from each of these superbubbles, and X-ray emission is brighter than is
theoretically expected for a wind-blown bubble, suggesting that the X-ray
emission from the superbubbles has been enhanced by interactions between the
superbubble shell and interior SNRs. We have also found significant positive
correlations between the X-ray luminosity of a superbubble and its H-alpha
luminosity, expansion velocity, and OB star count. Further, we have found that
a large fraction of the superbubbles in the sample show evidence of
``breakout'' regions, where hot X-ray emitting gas extends beyond the H-alpha
shell.
