The borough was first enfranchised in 1300, but only seems to have sent burgesses to Parliament for a short time. By 1307 it was no longer included in the list of
Parliamentary boroughs. In the 17th century a solicitor named
William Hakewill, of Lincoln's Inn, rediscovered ancient writs confirming that Amersham, Great Marlow, and Wendover had all sent members to Parliament in the past, and succeeded in re-establishing their privileges (despite the opposition of James I), so that they resumed electing members from the Parliament of 1624. Hakewill himself was elected for Amersham in 1624. The right of election was held by householders paying
scot and lot, a local tax. This was one of the most democratic franchises used in elections to the
Unreformed House of Commons. However, because this was a small borough, from the seventeenth to the nineteenth centuries, it was under the patronage of the Drake family of Shardeloes (an estate about a mile from the town). In the early eighteenth century, there were about 150 electors. Although, at this period, the Drakes did not own most of the houses, they were able to nominate candidates for both seats. An anti-Drake element in the electorate supported a candidate in opposition to the Tory candidates promoted by the Drake interest, at elections in 1728, 1734 and 1735. That opposition proved to represent about a third of the electorate. Thereafter the Drakes enjoyed unchallenged possession of their
pocket borough. There was no further sign of the sort of resistance to the dominant interest that broke out from time to time in many similar boroughs. By the latter half of the eighteenth century, the Drakes owned most of the town. The number of voters were reduced to about 70. Elections were all uncontested. The borough was treated with respect by its patrons. Uncontested elections were accompanied by generous expenditure, estimated by Davis as £350 in the eighteenth century and £600 in the 1820s. Amersham was one of the boroughs totally disenfranchised by the
Reform Act 1832. The 1831 census had shown that the population of the borough was 1,347, and there were 247 houses (although the whole town of Amersham had 360 houses). {{cite web| url = http://www.historyofparliamentonline.org/volume/1715-1754/constituencies/amersham {{cite web| url = http://www.historyofparliamentonline.org/volume/1754-1790/constituencies/amersham | title= Amersham {{cite web| url = http://www.historyofparliamentonline.org/volume/1790-1820/constituencies/amersham {{cite web| url = http://www.historyofparliamentonline.org/volume/1820-1832/constituencies/amersham ==Members of Parliament==