Parish Map of Buckinghamshire
https://www.bucksgs.org.uk/maps/parish.html

Genuki - more information on each parish
https://met.open.ac.uk/genuki/big/eng/BKM/#index

Maps of the counties of England produced by Family Search. The maps show various levels of county division including parish and civil registration districts.
Civil registration commenced on 1st July 1837. Due to growth and movement of the population the civil registration districts have changed over the years
https://maps.familysearch.org/

The Centre for Buckinghamshire Studies - has lists of the Anglican and Non-Conformist burial registers deposited in their care.
https://www.buckscc.gov.uk/leisure-an...shire-studies/

Find a Library - some of which have microfilm of parish registers for their area
https://www.buckscc.gov.uk/leisure-an...ind-a-library/

The National Burial Index 3 (NBI) CD covers 176 parishes in Buckinghamshire. Findmypast also has some of these indexes but not all.
https://www.ffhs.org.uk/burials/nbi-coverage.php

Buckinghamshire Family History Society. Bucks FHS are transcribing and publishing all existing parish registers (baptisms. marriages and burials) for the parishes within the pre-1974 county of Buckinghamshire.
Where some early registers haven't survived Bishops' Transcripts have been used to fill the gaps.
https://www.bucksfhs.org.uk/

BMD Registers - A pay per view site for records of birth, baptism, marriage, death and burial taken from non parish sources eg: Methodists, Wesleyans, Baptists, Independents, Protestant Dissenters, Congregationalist, Presbyterians, Unitarians, Quakers (Society of Friends), Dissenters and Russian Orthodox. Maternity Records. Overseas Records and early Birth Registers and various other BMD records
https://www.bmdregisters.co.uk/

The National Archives guide to nonconformist records
https://www.nationalarchives.gov.uk/h...onconformists/

The Catholic National Library has some listed transcripts of burial registers.
https://www.catholic-library.org.uk/registers.html

The Catholic Family History Society
https://www.catholic-history.org.uk/cfhs/

The Catholic Diocese of Northampton
https://www.northamptondiocese.org/TH...3/Default.aspx

The National Archives Guide to Catholic Resources
https://www.nationalarchives.gov.uk/h...des/catholics/