Bulstrode is a large park and mansion to the northwest of the Buckinghamshire town of Gerrard's Cross in the English Home Counties. The estate predates the Norman conquest and the name may originate from the Anglo-Saxon words burh (marsh) and stród meaning (fort). 
The previous house was built in 1686 for the infamous Judge Jeffreys. It was sold to Hans William Bentinck, 1st Earl of Portland, who made it one of his principal residences and died there in 1709. In the 1740s, the architect and builder Stiff Leadbetter altered the house significantly for the 2nd Duke of Portland. Between 1806-1809, there were further re-modellings and additions, including the castellated West Wing, to the designs of James Wyatt for the 3rd Duke.
Bulstrode was used by Margaret Bentinck, the wife of the 2nd Duke to house her natural history and antiquities collection, with the south-west side of the park used for live specimens (called Menagerie Wood today). The botanists Joseph Banks and Daniel Solander donated to the Dowager many exotic plants to develop the gardens at Bulstrode, which became the inspiration for Mrs Mary Delany's floral “paper mosaicks” now held in the British Museum Library which were greatly admired by Queen Charlotte. Their son, the 3rd Duke was a collector of marble and glass, and was influential in loaning the Roman Portland Vase to Josiah Wedgwood.
When the 4th Duke of Portland inherited the title in 1809, he disposed of Bulstrode. The title then passed into the hands of the Dukes of Somerset, who descended from Edward Seymour, 1st Duke of Somerset, the brother of Jane Seymour.
The 12th Duke of Somerset, Edward Adolphus Seymour commissioned the present mansion, completed in 1865. After his death, it passed to his daughter, Lady Helen Guendolen Ramsden and then to her son, Sir John Frecheville Ramsden, until he lost his fortune.
After the War, Sir John used part of the property for chemical research into sisal by-products, but the property fell into disrepair.
After his death in 1958, the park was sold to a farmer, and the mansion and woodland were bought by the Bruderhof community, who support themselves with light industry.
In 1966, the community moved to Kent, and the property was bought by WEC International, a Christian evangelical mission agency, who are gradually restoring and improving the public parts of the house's interior.
The history of the house and a Guide to the gardens are available from the house's reception or bookshop in a publication called 'Bulstrode, the home of WEC International'. Bulstrode is open to the public one weekend in May or June every year, but visits to the grounds can be organized by prior arrangement with WEC International, Bulstrode, Oxford Road, Gerrards Cross, Buckinghamshire, SL9 8SZ, England.
- Bosworth-Toller. "Anglo-Saxon dictionary".
- The Paper Garden: Mrs Delany Begins Her Life's Work at 72 by Molly Peacock Bloomsbury Publishing Plc 140882101X
- Stewart and Jean, Moulds (May–June 2004). "Recruitment, Renewal and Redevelopment". WEC Worldwide magazine 528: 3.
- Bulstrode Park entry from The DiCamillo Companion to British & Irish Country Houses
- Further details of current owners (WEC International)