General elections have seen a Conservative winning margin of between 10,416 and 22,220 votes since the seat's creation. In every election except two, Liberals, or subsequently Liberal Democrats, have come second with results as high as 31.15% of the votes cast. Labour have only come second twice, never achieving higher than 20.6%. In June 2016, an estimated 55% of local adults voting in the EU membership referendum in the constituency voted to remain in the European Union. The estimated turnout of 83.6% was highest turnout of any constituency in the UK, the only higher turnout in the referendum being Gibraltar. In the 2019 EU Parliament elections, over 50% voted for parties supporting continued UK membership of the EU on a turnout of 42.8%. The pro-EU Liberal Democrats were the most popular party with 31.9%, with the pro-Leave Brexit Party in second place with 30%. Despite the seat's Remain-stance, its pro-Brexit MP, Dame Cheryl Gillan, has been re-elected with over half the vote in both the General Elections since the Referendum, albeit with a reduced majority.
Boundaries and boundary changes
1974–1983: The Urban District of Chesham, and the Rural District of Amersham. 1983–1997: The District of Chiltern wards of Amersham Common, Amersham-on-the-Hill, Amersham Town, Asheridge Vale, Ashley Green and Latimer, Austenwood, Chalfont Common, Chalfont St Giles, Chalfont St Peter Central, Chartridge, Chenies, Chesham Bois and Weedon Hill, Cholesbury and The Lee, Coleshill and Penn Street, Gold Hill, Hilltop, Holmer Green, Little Chalfont, Little Missenden, Lowndes, Newtown, Penn, Pond Park, St Mary's, Seer Green and Jordans, Townsend, and Waterside, and the District of Wycombe wards of Hazlemere North and Hazlemere South. Hazlemere transferred from Wycombe. Great Missenden transferred to Aylesbury. 1997–2010: All the wards of the District of Chiltern except the wards of Ballinger and South Heath, Great Missenden, and Prestwood and Heath End, and the District of Wycombe wards of Hazlemere Central, Hazlemere East and Hazlemere West. Minor changes. 2010–present: The District of Chiltern wards of Amersham Common, Amersham-on-the-Hill, Amersham Town, Asheridge Vale and Lowndes, Ashley Green, Latimer and Chenies, Austenwood, Ballinger, South Heath and Chartridge, Central, Chalfont Common, Chalfont St Giles, Chesham Bois and Weedon Hill, Cholesbury, The Lee and Bellingdon, Gold Hill, Great Missenden, Hilltop and Townsend, Holmer Green, Little Chalfont, Little Missenden, Newtown, Penn and Coleshill, Prestwood and Heath End, Ridgeway, St Mary's and Waterside, Seer Green, and Vale. Great Missenden transferred back from Aylesbury and Hazlemere returned to Wycombe. The constituency is in Buckinghamshire and coincides with the Chiltern Local Government District. It includes the towns of Chesham and Amersham and outlying rural village settlements within the Metropolitan Green Belt and partly also within the Chilterns AONB. The area is connected with central London by the Metropolitan line of London Underground and the London to Aylesbury Lineoperated byChiltern Railways. The constituency is also close to the M40 motorway and is one the Conservatives' safest seats, home to many affluent professionals and commuters to London.
Members of Parliament
The current Member of Parliament for Chesham and Amersham is the Conservative Cheryl Gillan. She has been in this position since 1992.
