Old Hall Green is a hamlet in Hertfordshire, England.

At the 2011 Census the population was included in the civil parish of Standon.

In 1793, an academy, St Edmund's College, Ware, was established there which provided a school for Catholic boys and a seminary to train priests serving England's recusant community.

[1] Whilst the school remains, the seminary was moved to Chelsea in 1975.

Media related to Old Hall Green at Wikimedia Commons