Abstract: Non-reducing dielectric ceramic compositions comprise solid solutions which are represented by the compositional formula:{(Ba.sub.1-x Ca.sub.x)O}.sub.m .multidot.(Ti.sub.1-y Zr.sub.y)O.sub.2wherein m, x and y have the following values:1.005 .ltoreq. m .ltoreq. 1.030.02 .ltoreq. x .ltoreq. 0.22O < y .ltoreq. 0.20The compositions possess high permittivity and small dielectric loss and maintain high insulation resistance even if fired in reducing atmospheres, thus making it possible to manufacture inexpensive but high reliable monolithic or multi-layer ceramic capacitors.