The two-volume set LNAI 15299 and 15300 constitutes the refereed proceedings of the 26th International Conference on Speech and Computer, SPECOM 2024, held in Belgrade, Serbia, during November 25-28, 2024. The 53 full papers included in these proceedings were carefully reviewed and selected from 90 submissions. The book also contains two invited talks in full paper length. The papers are organized in the following topical sections: Volume I: Invited papers; automatic speech recognition; speech and language resources; speech synthesis and perception; and speech processing for medicine. Volume II: Computational paralinguistics; affective computing; speaker recognition; digital speech processing; natural language processing.