Louise Dacquay (born June 25, 1940 in Manitou, Manitoba) is a politician in Manitoba, Canada. She was a member of the Manitoba legislature from 1990 to 2003, and served as Speaker of the assembly from 1995 to 1999.

Dacquay is a certified Business Education Teacher, and worked as a teacher for 17 years, mostly in the Fort Garry School Division in Winnipeg. She was a regional organizer for the Progressive Conservative Party of Manitoba from 1984 to 1986, and an executive director from 1987 to 1989. Between 1986 and 1989, she was also a municipal councillor in Winnipeg, representing the city's Langevin Ward. She won the seat from veteran councillor Evelyn Reese in 1986, but lost it to Reese again three years later.

Dacquay was first elected to the Manitoba legislature in the 1990 provincial election, defeating incumbent Liberal Herold Driedger by 47 votes in the south-end Winnipeg riding of Seine River. She was named Deputy Speaker of the assembly on October 11, 1990, and held this position for the entirety of the four-and-a-half year parliament which followed.

Dacquay was re-elected by a greater margin in the 1995 provincial election, and became Speaker of the assembly on May 23, 1995. Unlike her predecessor, Denis Rocan, Dacquay was frequently accused of partisanship by members of the opposition New Democratic Party of Manitoba, particularly during assembly debates on the privatization of Manitoba's telephone system. NDP MLA Steve Ashton called for Dacquay's resignation in 1996, after she refused to grant him leave to make a parliamentary Point of Order; other NDP MLAs would make similar requests over the next three years.

The Progressive Conservatives were defeated in the provincial election of 1999, although Dacquay was personally re-elected. As in other south-end Winnipeg ridings, the NDP overtook the Liberals for second place in Seine River. Dacquay served as opposition critic for Culture, Heritage and Tourism in the following parliament.

The NDP targeted the Seine River seat in the 2003 election and Dacquay was defeated by NDP candidate Theresa Oswald, 4314 votes to 3582.