List of tallest buildings in Saint John, New Brunswick

This is a list of the tallest buildings in Saint John, New Brunswick.

Saint John is a city on the Fundy coast of New Brunswick and is the first incorporated city in Canada. In Saint John, there are 6 buildings that stand taller than 50 m. The tallest building in the city is the 19-storey, 81 m Brunswick Square. This building is tied with Assumption Place in Moncton for tallest building in New Brunswick. However this building is the second largest office building by floor space in all of Atlantic Canada after the Maritime Centre in Halifax. The second-tallest building in the city is Saint John City Hall, standing at 55.2 m tall with 15 storeys.

, the city contained 1 skyscraper over 80 m and 12 high-rise buildings that exceed 30 m in height.

In July 2018, Irving Oil began construction on a new headquarters in Uptown Saint John, next to the imperial theatre. This building is 11 storeys and 59 m in height, making it the city's second tallest building. The tallest proposed development that could be under construction soon in Saint John is the Coast Guard Redevelopment project, with three proposed towers all 52 m tall with 12 floors. If constructed, the Coast Guard Redevelopment will be the single largest residential construction project ever undertaken in New Brunswick.

Tallest buildings
This list ranks buildings in Saint John that stand at least 30 metres (98 ft) tall, based on CTBUH height measurement standards. This includes spires and architectural details but does not include antenna masts.

City Market
The Saint John City Market is the oldest continuing farmer's market in Canada, with a charter dating from 1785. Located in Saint John, New Brunswick and completed in 1876, the current market building has a unique roof structure that resembles an inverted ship's keel. Made of wooden trusses, the structure was reportedly built by unemployed ship carpenters of the day. Also, the floor slopes with the natural grade of the land. The architecture is in the Second Empire style.

Some of the businesses in the market have been operating continuously there for more than 100 years. Facing onto Kings Square, the market is connected to the city's indoor pedway system.

The market was designated a National Historic Site of Canada in 1986.

Courtenay Bay Generating Station
The Courtenay Bay Generating Station is a decommissioned oil-fired power plant owned by NB Power. The plant generated 113 megawatts of baseline electricity for the province between 1960 and 2008. In 1998, the plant was considered for conversion to natural gas as the primary fuel source, but this never came to be.