Cissa merupakan seorang raja Saxon legendaris dari Sussex, ia adalah putra dan penerus Ælle yang bertakhta pada sekitar tahun 514 atau 515. Ia meninggal tanpa keturunan. Setelah kematiannya, raja WessexCeawlin merebut Sussex, yang dilanjutkan oleh penerusnya Ceolric dan Ceolwulf. Pada tahun 648, Æthelwealh dimakzulkan sebagai raja Sussex oleh Saxon Barat.
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St Thomas a Becket - Parish Church at the East end of Pagham Harbour Various AS artefacts found in the area including a cremation urn restored and dated by British museum.