Flag of Cozumel, Quintana Roo, Mexico
Own work based on: https://galucomunicacion.com/conmemora-ayuntamiento-de-cozumel-el-50-aniversario-luctuoso/, https://www.elpuntosobrelai.com/ayuntamiento-de-cozumel-exhorta-a-cumplir-con-la-ley-seca/, https://cozumel.gob.mx/prensa/reafirma-juanita-alonso-compromiso-de-redoblar-esfuerzos-para-el-cambio-social-que-desea-la-comunidad/. Original uploader is Wikisole, who seems to have very likely vectorized a fictional flag.
Flagvisioner