New polyamides were prepared by the solution polycondensation and interfacial polycondensation starting from 1,6-diaminodiamantane and aromatic diacid chlorides. The polyamides had inherent viscosities of 0.15-0.45 dL/g. The temperatures at 5% weight loss for the polyamides were between 435-475 degrees C in nitrogen. The glass transition temperatures of the polyamides determined by DSC ranged from 245 degrees C to 300 degrees C. The crystallinity of the resultant polyamides was influenced by the method of polycondensation and various monomers.