Coordinates: 51°30′40″N 3°11′56″W / 51.511°N 3.199°W
Heath (Welsh: Y Mynydd Bychan) is a district, community and coterminous electoral ward in the north of Cardiff, capital of Wales.
The population of the ward taken at the 2011 census was 12,629.
Heath was originally called the Great Heath and named as a result of the large park and woodland that it once contained. After the initial development of traditionally middle-classed semi-detached housing (1920s-1950s) and more recently the construction of the University Hospital of Wales on the site of the former Heath Wood (1960s), much of the greenery has been eradicated. Heath Park forms the remainder of this grass and woodland and is very popular, having attractions such as a miniature steam railway and sports facilities. It should be distinguished from the Little Heath (Welsh: Y Waun Ddyfal) which lies to the south of the Great Heath, in the vicinity of Crwys Road. Birchgrove is a busy shopping area that is part of the ward of Heath. It is composed mostly of more affordably priced housing, mainly terraced, and has taken on an identity of its own.
The area around the University Hospital of Wales has been known as Saints Corner, due to the number of streets in the area named after well known saints.
The number of Heath residents over three years old who speak Welsh increased from 1,378 in the 2001 UK Census to 1,422 in the 2011 UK Census. In percentage terms there was a slight decrease (from 12.1% to 11.7%). This was caused by a reduction in the number of speakers over the age of 65; the age groups 3–15 and 16—64 both showed increases.