The postal area DL (Darlington) comprises of the following post towns; these towns should be written in capital letters when used in addresses.

Country	Post Town	Postal District
England	Darlington	DL1 DL2 DL3
	Shildon	DL4
	Newton Aycliffe	DL5
	Northallerton	DL6 DL7
	Bedale Leyburn Hawes	DL8
	Catterick Garrison	DL9
	Richmond	DL10 DL11
	Barnard Castle	DL12
	Bishop Auckland	DL13 DL14
	Crook	DL15
	Spennymoor	DL16
	Ferryhill	DL17

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