Methylcyclopropane is an organic compound with the structural formula C<sub>3</sub>H<sub>5</sub>CH<sub>3</sub>. This colorless gas is the monomethyl derivative of cyclopropane.
Methylcyclopropane, like many other cyclopropanes, undergoes ring-opening reactions. Bond cleavage in certain reactions is also reported in conjunction with the use of methylenecyclopropane groups as protective groups for amines.