The Upper Hutt Blockhouse also known as the Wallaceville Blockhouse is a 19th-century American-style military blockhouse situated in Upper Hutt, New Zealand. One of very few such blockhouses built in New Zealand, it is preserved as a Category I historic place. It was built in late 1860 as part of a larger Stockade and was one of two Blockhouses and Stockades built in the Hutt Valley that year. It was occupied by the Hutt Battalion of the Wellington Militia from December 1860 to May 1861 without coming under hostile attack.
Originally built in a paddock at the end of Fortune Lane, that was later described as the "old Government Stockade" reserve; the Blockhouse can now be found at the end of Blockhouse Lane, off McHardie Street, adjacent to the sports fields within the grounds of Heretaunga College.