Thompson Square consists of George Street, Bridge Street, Thompson Square and The Terrace. These streets surround a small turfed reserve with pleasant trees that helps to conserve an attractive frontage to the important surrounding buildings. One large old hoop pine tree (
Araucaria cunninghamii) over the cutting for the
Putty Road is reputed to be all that remains of the mid-late 19th century plantings around the square. Once there were Norfolk Island pines (
Araucaria heterophylla) on the square's western side outside the Macquarie Arms Hotel and in front of the Fitzgerald wall. These were removed, as well as native fig tree species, after protests concerning acts of public indecency by people leaving the nearby hotel relieving themselves under the trees. Also growing around the square are several silky oak trees (
Grevillea robusta) and one kurrajong (
Brachychiton populneus). Thompson Square is surrounded by a number of Colonial Georgian buildings including; ;The Doctor's House – 1–3 Thompson Square A fine, substantial two storey
sandstone brick terrace building. It has a good joinery attic storey, fine front door flanked by engaged
columns and a very well designed
fanlight. ;House & outbuildings – 5 Thompson Square A brick Georgian single storey cottage of three
bays with a
corrugated iron roof and three bay timber
verandah. ;Hawkesbury Museum – 7 Thompson Square A brick Georgian two storeyed house with corrugated iron roof, five bays wide with a five bay verandah. The
balcony is a Victorian addition and has a fine cast iron
balustrade. ;Macquarie Arms Hotel – cnr Thompson and George Streets A two storeyed stuccoed brick inn with attic storey and cellars and corrugated iron roof. The Colonial character has been impaired with the addition of box like protuberances to the corners of the building. ;Vacant site – 60 George Street ;Cottage – 62 George Street A single storey Georgian cottage. A Victorian cast iron columns, balustrading and valance. ;Shops – 64, 66, 68 George Street A two-storey stuccoed brick house and shop formerly occupied by Georgian single storey terraces. ;70, 72 George Street Formerly Hawkesbury Garage, now a shop. ;74 George Street (A.C Stearn Building) Stuccoed two storey building with a
parapet to the street front. ;82 George Street One storey house turned into a shop. ;Vacant site – 4 Bridge Street ;House & outbuildings – 6 Bridge Street A brick Georgian cottage of five bays with a three bay timber verandah and balancing brick
chimneys and corrugated iron roof. ;House & outbuildings – 10 Bridge Street A two-storey brick Regency style building with a particularly fine cast iron verandah, balcony and stuccoed parapet. ;House – 17 Bridge Street A brick Georgian single storey cottage with corrugated iron roof, of five bays. ;Former School of Arts – cnr Bridge Street and George Street A single storey brick stuccoed Italianate hall with the later additions of side wings and a
loggia. ;Pioneer Families Bicentennial Memorial Featuring an anchor, symbolising the importance of the river in the history of the town and the nation, with a plaque recording the names of many of the early families. == Heritage listing ==