There are numerous heritage buildings and sites in Williamstown, Victoria, Australia.

Syme Street Williamstown Landing Place (Syme Street). The eastern end of Commonwealth Reserve was used as an early landing place to unload stock as early as 1836, and was probably near or on the subsequent site of Gem Pier.

Gem Pier & Commonwealth Reserve (Syme Street and Nelson Place). A 30-metre stone jetty was built by convict labour in 1838 where Gem Pier now stands at the end of Syme Street. Permanently stationed at Gem Pier is the Bathurst class corvette HMAS Castlemaine (1942) – a World War II minesweeper which was built at the local shipyards. It is now used as a maritime museum. Aside from the ship itself there is a collection of nautical memorabilia and exhibits within its confines. Another historic ship the Enterprize sails from Gem pier every month. Bay cruises and returns trips to Southbank also depart from Gem Pier.

Nelson Place Tide Gauge House (Nelson Place). Built by convict labour at Point Gellibrand in 1857 to house one of three tide gauges that arrived from England in 1855, the bluestone Tide Gauge House is associated with the origin of the Australian Height Datum. Former Bank of Australasia (189 Nelson Place). Designed by Reed and Barnes and constructed by Pearce and Murray in 1876–77, this was the eighth branch to be constructed for the Bank since its incorporation in 1835 and is believed to be the first suburban example. Former Bay View Hotel (175 Nelson Place). The Wilkinson Memorial Drinking Fountain (Cnr Syme Street and Nelson Place). Former English, Scottish and Australian Bank (139 Nelson Place). Also known as the Mission to Seaman, and now occupied by Breizoz Crêpes, this building originally housed the second suburban branch of the fifteen ES&A banks known to have been built in Victoria. It was the first major purpose built bank branch in Williamstown. Williamstown Customs House (Cnr Syme Street and Nelson Place). A stuccoed structure erected from 1873, to designs presumably by the Public Works Department of Victoria, the building is architecturally significant as a fine and relatively intact example of conservative Classical revival style architecture. It served as a Customs House, offices and residence. Jacks & McIntosh Boat Repair Facilities (120 Nelson Place and 36 Syme Street). One of the first private boatbuilders in Williamstown, Jacks and McIntosh boatbuilders and shipwrights were located at the end of Thompson Street in 1841. The site is now occupied by the Royal Yacht Club of Victoria. Williamstown Immigration Office and Depot (120 and 123 Nelson Place). These offices were established in Nelson Place near the corner of Thompson Street in the mid to late 1850s to process new arrivals during the gold rush. Craigantina (125–129 Nelson Place). Comprising three two storey shops and residences, Craigantina was constructed in 1886 for John Harker Craig. Former Royal Hotel (85 Nelson Place). The grand scale of the Royal Hotel is a consequence of change to Victoria's licensing laws in 1877, which required hotels to have a minimum of 30 rooms of minimum dimensions to be licensed. The architect of the brick hotel, completed by 1893, was hotel specialist T. Anthoness and the builder was Henry Hick. The Old Morgue (Ann Street). Now situated in the old Port of Melbourne Authority site, the former morgue is one of Williamstown's early structures, important architecturally but more especially for its role in Williamstown's history. The Georgian style building is believed to be the first morgue erected in Victoria (at its original location near Gem Pier in 1859) and was constructed in bluestone with convict labour. The building was subsequently relocated three times. Access to the Morgue is by appointment or through historical tours. Williamstown Dockyards, including Alfred Graving Dock (Ann Street and Nelson Place). A Former Oriental Hotel (55 Nelson Place). There has been a building (Skelton Oriental Building) on this site since about 1850 when Benjamin Skelton built his corner building after purchasing land from the Crown in 1849 - Section 1, Allotment 8. The large three-storey flat roof with ornate parapet building was built before 1852 when it appears in a drawing of Williamstown by the famous artist, engineer and surveyor Edward Snell (designer of the Geelong Melbourne Railway). The drawing was later printed in 1854 by Quarrill as a Lithograph. With Benjamin Skelton taking a mortgage in June 1851 to develop the land with second substantial building on the Nelson Place frontage of Allotment 8, it seems that the Skelton Oriental Building is in fact pre the mortgage of June 1851 making it importantly one of the few pre-separation buildings. Pre-separation is an important heritage period which is before the Colony of Victoria separated from the Colony of NSW on 1 July 1851 and that period is pre Gold Rush too (September 1851). It is a unique building in design as well as age—the oldest remnant three-storey building.

Former Prince of Wales Hotel (1 Nelson Place). Originally constructed c.1857, possibly to a design by Charles Laing, this is one of the oldest hotels and public buildings in Williamstown. It was first owned by the surgeon John Wilkins. Today it is occupied by the Titanic Theatre Restaurant.

Battery Road Gellibrand Pier and Breakwater Pier (off Battery Road). Williamstown Lighthouse or Timeball Tower at Point Gellibrand (Battery Road). Built in 1855 by convict labour, this bluestone tower originally operated as a lighthouse and still operates as a timeball. The tower is part of the Point Gellibrand Coastal Heritage Park, which is managed by Parks Victoria. Fort Gellibrand (Battery Road). A site located near Point Gellibrand at the southernmost tip of Williamstown, Fort Gellibrand is of historical importance to the State of Victoria for its association with the development of defence strategies for the colony in the nineteenth century and for its association with the convict hulk period of the penal system in the colony. The Point Gellibrand shore batteries were first developed as part of an immediate defensive system for the city and port of Melbourne, prior to the establishment of batteries at the Port Phillip heads. The fort site contains the only remaining visible physical evidence of the system of four battery positions at Point Gellibrand from this period. The batteries at the fort were upgraded in the 1870s and 1880s, and the fort remained an integral part of the defensive system for Port Philip up until the late 1880s and 1890s. Today, the Fort is home to a reserve commando regiment of the Australian Army, the 2 Commando Company of the 1st Commando Regiment.

The Esplanade

The Williamstown Dressing Pavilion (The Esplanade). Constructed at Williamstown Beach in 1936, the pavilion is an architecturally significant early example of European Modernism applied to the design of a pavilion structure by two then relatively unknown architects Arnold Bridge and Alan Bogle.http://www.heritage.vic.gov.au/page_239.asp?submit_action=detailed_result&ID=239&KW1=Williamstown&query=e82db8dc6517362a4a25678b00095532/4ac8ea806ae665a4ca2573da00724146?OpenDocument&Highlight=0,Williamstown Former Lawn House (92 The Esplanade). In 1889–90 Williamstown's prolific contractor, John Garnsworthy, built this house for his own use and lived there for at least the following fifteen years until the construction of his last residence, 'White House', at 5 The Strand. Mr Garnsworthy performed a number of large civil contracts throughout the State as part of the firm of Garnsworthy & Smith. These include the first contract for the costly formation of the entrance to the Gippsland Lakes (1883 for £13,328) and the Warrnambool breakwater (1884). Locally, his firm constructed part of the MMBW pumping station and the Melbourne Glass Bottle Works complex, both in Spotswood. Mr Garnsworthy was also on the first 'election' committee for the Williamstown Cottage Hospital after its incorporation in 1893. The Williamstown Hospital (Railway Crescent). The Williamstown Hospital was opened on its present site in 1894. Enlarged and extended many times over the years, only part of the original building still survives and is only partly visible from Stewart Street. Williamstown Croquet Club Pavilion (Victoria Street). Designed by Morsby & Coates and constructed in 1930, the Williamstown Croquet Club pavilion illustrates the development of Victoria Street as a fashionable middle class enclave in Williamstown during the Interwar period. Williamstown Station precinct (Ann and Thompson Streets). The Williamstown railway station building and platform canopy, brick toilet block, timber and corrugated iron shed, platform, the Ann Street footbridge and the Thompson Street road bridge are all listed on the Victorian Heritage Register as it is the only substantially intact station precinct remaining from the original construction period of the Williamstown railway line. Williamstown Mechanics Institute (Electra Street). One of Hobsons Bay's most historic sites, the foundation stone of the present building, originally a Mechanics Institute was laid in 1860. The institute now houses the Williamstown Historic society and a wealth of memorabilia about the local area and its development through the years, in addition to the thriving Williamstown Musical Theatre Company (WMTC) which has a vast history itself and stages various Musicals, Revues and Festivals throughout the year. www.wmtc.org.au Excelsior Lodge of Industry Masonic Temple (Electra Street). Located close to the Mechanics Institute, this single-storey, red brick hall with a symmetrical Classical facade provides a powerful illustration of the importance of Masonic associations in the development of the Williamstown community during the nineteenth century and early twentieth century. Park House, former Presbyterian Manse (27 Lyons Street). Designed by architect David Ross and built in 1856, this two-storey bluestone Georgian building was purchased in 1886 by Henry Hick and renamed Park House. Former George Hotel (Lyons Street). An original timber building established in 1863 was replaced by the present building in 1872. The first licensee was George Gobal, a local councillor who served as Lord Mayor in 1879–80. The hotel was delicensed in 1927 and became a rooming house until 1978. Former City of Williamstown Municipal Offices and Town Hall (Ferguson Street). The former Williamstown Municipal Offices uses an austere form of Italian and French Renaissance typical of the 1920s in Melbourne, were opened by the State Governor, Sir Arthur Stanley, in May 1919, almost one year after the foundation stone had been laid by the Mayor of Williamstown, Cr C Knowles on 5 June 1918. Following the amalgamation in 1994 of the City Williamstown with the City of Altona (and parts of other municipalities) the majority of municipal and administrative functions were transferred to the civic centre at Civic Parade, Altona. The buildings are currently undergoing restoration. Former Williamstown City Council Electricity Supply Department (Bath Place). A near original example of an Interwar industrial building, the Williamstown City Council Electricity Supply Department building was designed for the Council by architects Frederick Morsby and HF Coates and constructed in 1929. This building in one of only two identified in the municipality that were directly associated with the Electricity Supply Department; the other is a former substation building in Stevedore Street. Former Punshon's Store (Ferguson Street). Designed by C. J. Polain, construction of this General store with cellar and roof garden was completed in 1890.