In 1801 there were 2,246 inhabitants in Thetford.
By 1861 there were 4,208.
There were 489 dwellings in 1809 and about 900 by 1867.

The Borough of Thetford consists of Thetford St. Cuthbert, Thetford St. Mary and Thetford St. Peter.
Of those parishes Thetford St. Mary is wholly contained within the Shropham Hundred as are approximately 50 acres of both Thetford St. Cuthbert and Thetford St. Peter.
Records of licensees are only found in the Grimshoe and Thetford registers.

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It was reported 24th May 1854 that the brewers had raised the price of a barrel of beer by four shillings. This would cause the publicans to raise the price of a quart by one half-penny, a large percentage increase for the consumer. However, in Thetford one would still be able to get "twopenny" worth for twopence and the Town Crier went around town announcing that no change had, or would be made at several of the establishments.

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In February 1910 it was reported that there were 19 fully licensed houses, 7 beer houses, 1 six day house and 3 wine and spirit off-licences - total 30.
 The Good Woman Inn had been closed voluntarily and the Castle Inn compulsory.

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In June 1951, an article by Black Friar noted that some new inn signs had appeared in the town.
The Ark had on one side, the Ark on the crest of two angry waves. The Black Horse had a suitably prancing horse gracing Magdalen Street and yet another new sign stood outside the Bridge Tavern, near Thetford Bridge Station. It appeared that the brewers were making an appreciable effort towards brighter and better inn signs.



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