In the wake of reforms to establish a free market in land-use rights, Vietnam is experiencing a pronounced rise in rural landlessness. To some observers this is a harmless by-product of a more efficient economy, while to others it signals the return of the pre-socialist class-structure, with the rural landless at the bottom of the economic ladder. The authors' theoretical model suggests that removing restrictions on land markets will increase landlessness among the poor, but that there will be both gainers and losers, with uncertain impacts on aggregate poverty. Empirically, they find that landlessness is less likely for the poor and that the observed rise in landlessness is poverty reducing on balance. However, there are marked regional differences, notably between the north and the south.