The parish church is St Vincent's and features several medieval wall murals.
The solicitor and historian Reginald Hine (1883-1949) was born in Newnham Hall.
Statistics are not available for Newnham alone for the 2011 Census. Due to the small population of the parish and its neighbours, statistics are presented jointly for the three parishes of Caldecote, Newnham and Radwell, in order to protect individuals' privacy. The combined population of these three parishes was 209.[2]