Northwich was first created as one of eight single-member divisions of Cheshire under the Redistribution of Seats Act 1885.

[2] Comprised the towns of Runcorn, Northwich, Winsford and Middlewich, and surrounding rural areas.

From 1 April 1974 until the constituency was abolished at the next boundary review which came into effect for the 1983 general election, the constituency was primarily situated in the newly formed District of Vale Royal, but its boundaries were unchanged.

Cuddington, Weaverham and western areas included in the re-established constituency of Eddisbury.

The political parties had been making preparations for an election to take place from 1939 and by the end of this year, the following candidates had been selected;