The Billericay Twinning Association was formed early 1998 to promote and foster friendship and understanding between the people of Billericay and other similar communities overseas. It is a non-local authority organisation.

The Billericay District Residents Association (BDRA) was established in 1926, and merged in 1962 with the Buttsbury Residents' Association to create its present form.

Churches Together in Billericay (CTB) is an ecumenical forum and focus for inter-church action in the town.

St. John's is the host for the Billericay Food Bank which has been serving the needy since March 2018.