Sealand is a community in Flintshire and electoral ward, north-east Wales, on the edge of the Wirral peninsula. It is west of the city of Chester, England, and is part of the Deeside conurbation on the Wales-England border. At the 2001 Census, it had a population of 2,746 (1,342 males, 1,404 females), increasing to 2,946 at the 2011 census.