There is a multitude of local history information available both online and in various archives. In fact the list is almost endless. Here are some which we hope you'll find useful:

Ancestry -
Aimed at family historians, but it gives access to census returns, birth, marriage and death indexes, and many other useful records. A subscription based service, but it can often be used for free in local libraries.

Bicester Vision -
This site centres on the Bicester of today. It aims is to keep you up to date with what's happening in Bicester, including plans and updates on developments, information about clubs and societies you can join, links to local schools, transport information, Bicester events, news and views.

British Association for Local History -

British History Online -

Cassini Maps -

Family History UK -

The Family Search -

Federation of Family History Societies -

Find My Past -

The Genealogy Guide -

The Historical Association -

The History Press -

Historical Directories of England & Wales - 
From the archives of the University of Leicester.

The National Archives -

Oxfordshire Family History Society -

Oxfordshire History - 
Website for the Oxfordshire Architectural and Historical Society, including a good section on how to get started in local history research.

Oxfordshire History Centre -
St Luke's Church, Temple Road, Cowley, Oxford, OX4 2HT. 01865 398200
Their catalogue is searchable online, and some items from their archive are viewable online too. But for the best research you should visit them in person.

Oxfordshire Local History Association -
A good source for information on local history societies in Oxfordshire.

ThoughtCo -
How to Use DNA Testing to Trace Your Family Tree

Victoria County History -