We have investigated the pseudo-binary solid solutions USn 2 - x Ge x (x=0.1, 0.2, 0.4, 0.6, 0.8, and 1) by magnetization, heat capacity, and resistivity measurements. The iso-structural end members USn 2 and UGe 2 are known to be antiferromagnetic and ferromagnetic, respectively. The solid solutions retain the same ZrGa 2 -type orthorhombic structure and the lattice parameters vary smoothly across the series. Evidence for long-range magnetic transitions is clearly seen in the data. USnGe is ferromagnetic like UGe 2 , with a saturation moment of 0.95μ B /U at 4.2K. On the other hand, USn 1 . 2 Ge 0 . 8 and alloys with x<0.8 are antiferromagnetic. The coefficient of the linear term in the heat capacity is enhanced in the solid solutions compared to the end members.