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.^[1] In Saint John, there are 6 buildings that stand taller than 50 m (164 ft). The tallest building in the city is the 19-storey, 81 m (266 ft) Brunswick Square.^[2] 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 (181 ft) tall with 15 storeys.

As of February 2017^[update], the city contained 1 skyscraper over 80 m (262 ft) and 12 high-rise buildings that exceed 30 m (98 ft) in height.^[3]

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 (194 ft) 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 (171 ft) tall with 12 floors. If constructed, the Coast Guard Redevelopment will be the single largest residential construction project ever undertaken in New Brunswick.

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.

More information Rank, Building ...

Rank	Building	Image	Height	Floors	Completed	Notes
1	Cathedral of the Immaculate Conception		82.3 metres (270 ft)	–	1853	Gothic style Catholic cathedral.
2	Brunswick Square		80.8 m (265 ft)	19	1976	Largest office building in New Brunswick by floor space (47,476.4 square metres (511,032 sq ft)), as well as the second largest in Atlantic Canada. Tied with Assumption Place in Moncton for the tallest building in New Brunswick.[4]
3	Irving Oil Home Office		56.6 m (186 ft)	11	2019	Headquarter building of Irving Oil.[5]
4	Saint John City Hall		55.2 m (181 ft)	15	1970	Office building with (15,329 square metres (165,000 sq ft)) of space.[6]
5	Brunswick House		52 m (171 ft)	14	–	Office building with (9,569 square metres (103,000 sq ft)) of space.[7]
6	Brentwood Tower		51 m (167 ft)	15	–	[8]
7	Admiral Beatty Hotel		51 m (167 ft)	8	1925	[9]
8	Irving Building		50 m (160 ft)	14	1977	[10]
9	Saint John Hilton Hotel		43.2 m (142 ft)	12	1982	Hotel with 192 rooms.[11]
10	Harbourside Senior Citizens Housing Complex		43 m (141 ft)	12	–	[12]
11	Stephenson Tower		41 m (135 ft)	11	–	[13]
12	Harbour Building		37 m (121 ft)	10	–	Office building.

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• List of tallest buildings in Atlantic Canada
• Canadian architecture