多伦多证券交易所（Toronto Stock Exchange，缩写：TSX）是加拿大最大、北美洲第三大、世界第七大的证券交易所，由多伦多证券交易所集团（TSX Group，TSX: X）拥有及管理。在该交易所上市的公司种类繁多，主要来自加拿大和美国。交易所的总部设于多伦多，在加拿大其他主要城市如温哥华、蒙特利尔、温尼伯及卡尔加里均设有办事处。

2011年2月9日伦敦交易所以约32亿美元（约249.6亿港元）收购多伦多交易所母公司TMX集团，将成为全球拥有最多上市公司的交易平台 每持有1股TMX股份，将会获得2.9963股伦敦交易所股份。合并后新公司市值约77亿美元（约600亿港元），伦敦交易所股东将持有新公司55%股权，TMX原股东则持有余下45%权益。

Toronto Stock Exchange (often abbreviated as TSX) is one of the largest stock exchanges in the world. It is the eighth largest exchange in the world by market capitalization. Based in Toronto, it is owned by and operated as a subsidiary of the TMX Group for the trading of senior equities. A broad range of businesses from Canada and abroad are represented on the exchange. In addition to conventional securities, the exchange lists various exchange-traded funds, split share corporations, income trusts and investment funds. More mining and oil and gas companies are listed on Toronto Stock Exchange than any other stock exchange.