This book constitutes the refereed proceedings of the 11th International Conference on Culture and Computing, C&C 2023, held as part of the 25th International Conference, HCI International 2023, which was held virtually in Copenhagen, Denmark in July 2023. The total of 1578 papers and 396 posters included in the HCII 2023 proceedings was carefully reviewed and selected from 7472 submissions. The C&C 2023 proceeding focuses on preserving, disseminating, and creating cultural heritages via ICT (e.g., digital archives), to empower humanities research via ICT (i.e., digital humanities), to create art and expressions via ICT (i.e., media art), to support interactive cultural heritage experiences (e.g., rituals), and to understand new cultures born on the Internet (e.g., net culture, social media, games).