The Central Belt of Scotland is the area of highest population density within Scotland. Depending on the definition used, it has a population of between 2.4 and 4.2 million (the country's total was around 5.4 million in 2019), including Greater Glasgow, Ayrshire, Falkirk, Edinburgh, Lothian and Fife.
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Despite the name, it is not geographically central but is nevertheless at the "waist" of Scotland on a conventional map and the term "central" is used in many local government, police and NGO designations.
It is likely considered the heart of the lowlands, a very old term and was for a few centuries sometimes recorded in Scotland as the Midlands and elsewhere as the Scottish Midlands which fell out of fashion.
In the early 21st century, predictions were made that due to economic migration indicators, the urban areas of Glasgow and Edinburgh, whose centres are approximately 41 miles (66 km) apart, could merge to create a megalopolis over the coming decades.