Lead(II) oxalate is an organic compound with the formula PbC2O4.

It may be prepared by the metathesis reaction between lead(II) nitrate and sodium oxalate:[3] A dihydrate may be formed with water solutions.

The unit cell volume is 569.8 Å3 with four formula per cell, giving a density of 3.860 g/cm3[4] The trihydrate has triclinic crystals with space group P1 and unit cell dimensions and angles: a = 6.008 Å, b=6.671 Å, c=8.493 Å, α=74.70°, β=74.33°, and γ=80.98°.

[5] Lead(II) oxalate is insoluble in water.

Its solubility is increased in presence of excess oxalate anions, due to the formation of the Pb(C2O4)22− complex ion.