Ceallasaigh Beag (or Keallasay Beg) is a low-lying island in Loch Maddy off North Uist in the Outer Hebrides of Scotland. This an area of shallow lagoons filled and drained by the tides each day. Ceallasaigh Mòr lies to the south and these two islets are connected by a narrow strip of sand during some low tides. The area is c. 46 hectares (110 acres) as measured from Ordnance Survey maps at high tide. Rick Livingstone's Tables of the Islands of Scotland give an area of 55 hectares (140 acres), which may include land connected at low tide such as the outlying islet of Corr Eilean Keallasay.