Wascana Centre is a 930-hectare (9.3 km²/2,300 acre/3.6 mi²) urban park built around Wascana Lake in Regina, Saskatchewan, Canada, established in 1912 with a design from renowned architect Thomas Mawson. The park is designed around the Saskatchewan Legislative Building and Wascana Lake. High-profile features include the University of Regina, Royal Saskatchewan Museum, Conexus Arts Centre, Saskatchewan Science Centre, and CBC Regional Broadcast Centre. Wascana Centre brings together lands and buildings owned by the City of Regina, University of Regina, and Province of Saskatchewan. The park is located immediately south of the city's downtown core, bordered by residential areas on the east, south and west, and on the south-east edge it spills out onto open Saskatchewan prairie along Wascana Creek.

Wascana lake was created in 1883 by damming Wascana Creek, a low flow seasonal run-off stream, to serve as a reliable water reservoir for the town and railway, and which residents readily began using for recreation. In 1905 Saskatchewan gained provincial status and planning began on a monumental — and in retrospect wildly optimistic — new capital building in Regina, a vision which required an equally monumental landscaping plan. The new Saskatchewan Legislative Building was completed in 1912 and with it the 1912 Mawson Plan for Wascana Park.

By the 1950s the city was growing rapidly and pressures on the park led to its incorporation as the Wascana Centre Authority (1962), with a mandate to establish an ongoing vision protecting the park as a valued asset of the city and province. The first Master Plan was developed the same year in conjunction with a new University of Saskatchewan campus to be built on the southeast end of the park. A revised Master Plan has been published every five to seven years since, the most recent being 2016.

In 2017 Wascana Centre Authority was dissolved and management was absorbed into the Saskatchewan government's Provincial Capital Commission.

The name "Wascana" is derived from the Cree word Oscana meaning "pile of bones" in reference to the plains bison bones scattered around Wascana Creek before the area was populated by non-indigenous people.

Wascana Lake was originally created in 1883 by damming Wascana Creek between Angus and Rae Streets, 11⁄2 blocks west of the present Albert Street dam and bridge, to provide a "stock watering hole" — the rolling stock of the CPR, that is. The Lake was soon turned to recreational use and Reginans took to the lake for sailing and canoeing.

In 1905 the newly formed provincial government set about to build a capital building, to be located in Regina. Landscape architect Frederick Todd was asked to perform an initial design study for the lands around the building and lake, completed in 1907 and styled on the English Romantic Landscape movement. The lake was slightly reduced in 1908 when a new dam and bridge were constructed in their present location, based on Todd's initial designs and advancing plans for the park. As the project developed an expanded plan was requested from architect Thomas Mawson, submitted in 1912 and which became the park template for the next five decades.

The lake continued for a time to be used as a domestic water supply and for stock watering; it also supplied the new legislative building. A longer term effect resulted, however, when lake water was used to cool machinery in the power plant (now the Powerhouse Museum) that was built in the eastern sector. Heated water returned to the lake, causing that sector to remain ice-free through the winter, and several species of migratory birds made it their year-round habitat. Although the old coal-fired power plant was decommissioned in the early 1970s, a permanent/non-migrating flock of Canada geese habituated to wintering in the city had to be rounded up and either transported out of the city or if injured then housed in a waterfowl sanctuary. The annual goose round-up continued into the 1990s. The eastern sector of the lake continues to be a waterfowl sanctuary.