Polyamides account for a relatively small volume of plastics compared to the total but represent a high value relating to their use as engineering materials in E&E, automotive, and food packaging applications. The largest volume polyamide PA 6 is made from and can be chemically depolymerized to caprolactam, making it an ideal candidate for chemical recycling. Chemical recycling provides the advantage of purification, allowing for higher quality. Many specialty polyamides like PA410, PA610, PA11, and PA10T are made from biobased castor oil and PA56 uses biobased pentanediamine obtained through fermentation. In some cases, bio-based alternative production pathways are or have been developed for current petrochemical-based monomers. An interest also exists to replace nonbiobased polyamides by biobased alternatives with similar or better properties. Polyamides are also made circular by mechanical and chemical recycling as is possible for caprolactam from PA6 and terephthalic acid from PET. Attention point is a well quantified low as possible carbon footprint in circular carbon source-based polyamides together with their potential to lower CO2 equivalent emission by their use.