45% were born in southern England as shown in the blue regions. This is roughly in line with the British general population. 4 time gold medalists Laura Trott and Ben Ainslie were born in southern England. 

16% are born in the Midlands which is in line with the general population. 6 of the 7 Midlands born were born in the West Midlands. Swimmer Rebecca Adlington was the only one born in the East Midlands. 

Wales and Scotland also have similar proportion to the general population. Six times gold medalists Chris Hoy was born in Edinburgh. 

17% were born in northern England. This is notably less than in the general population. Although Yorkshire is well represented as a sub-region producing athletes such as Jessica Ennis. Foreign born athletes such as Mo Farah are 7%.

None were born in Northern Ireland although it's quite a small population.