PaleoJudaica has posted much coverage of ancient mosaics in Israel over the years. I have listed below all mosaic posts I could find in a reasonable amount of time, and I don't think I missed many. If there are links, follow them, often for much more information.
- the Lod Mosaic
- the mosaic at Kibbutz Bet Qama
- the Samson mosaic at the Huqoq synagogue
- Zodiac mosaics in ancient synagogues
- the Khirbet Midras church mosaics
- the synagogue mosaic at Hamat Tiberias National Park
- the Madaba Map mosaic
- a mosaic in Caesarea
- the mosaic from Ma'on-Nirim
- the Khirbet Wadi Hamam synagogue mosaic
- a mosaic in Gaza
- the birds mosaic in Caesarea
- mosaics at Tel Shikmona
- a mosaic in Jerusalem
- mosaics in a Christian villa in Netanyahu
- mosaics at Magdala