Westlake Center is a four-story shopping center and 25-story office tower in downtown Seattle, Washington, United States. The southern terminus of the Seattle Center Monorail, it is located across Pine Street from Westlake Park, between 4th and 5th Avenues. It is named for Westlake Avenue, which now terminates north of the mall but once ran two blocks farther south to Pike Street. Westlake Park is considered Seattle's "town square" and celebrities and political figures often make appearances or give speeches from the building's balcony. The anchor stores are Saks Off 5th and Nordstrom Rack.

The current shopping center began construction in 1986 after over 20 years of planning, and opened its doors on October 20, 1988. The building was designed by RTKL Associates on a site of 11,000 square metres (120,000 sq ft). It had 82 tenant spaces and a 21-story office tower on its north side with 340,000 square feet (32,000 m) of space. Westlake Center underwent renovations in the late 1990s to add larger store spaces for new tenants in response to the opening of the adjacent Pacific Place shopping mall. It was home to a small Neiman Marcus concept store called The Galleries of Neiman Marcus, which opened in 1999 and closed in 2002.

The mall has two food courts: the Asean StrEAT Food Hall on the first floor, which opened in November 2022 and was designed to resemble Southeast Asian food hawker stands; and Bites on Pine Food Hall on the second floor.

The monorail terminal is located on the third floor. The mall's main food court was also on the third floor until a remodel in 2017 replaced it with a Saks Off 5th store. The Saks store is scheduled to close in July 2024.

Surrounding the mall and park, Seattle's main shopping district draws scores of both locals and visitors (the Washington State Convention and Trade Center is located in this district). To the west of Westlake Center is the (now-closed) main store for Macy's Northwest (previously the flagship store and corporate headquarters for The Bon Marché). To the east is the flagship Nordstrom store and corporate headquarters (previously the flagship store of Frederick & Nelson). In the surrounding area are locations for various major retailers and restaurant chains.

Seattle's version of the Macy's Thanksgiving Day Parade is located in this area. Also, many stores were vandalized during the WTO Ministerial Conference of 1999, during which massive protests occurred in downtown Seattle. It was also the site of the Occupy Seattle protest, which was a solidarity demonstration for Occupy Wall Street.

Westlake Center is a public transportation hub for Seattle, serving as a terminus for the Seattle Center Monorail and the South Lake Union Streetcar. Underneath the mall is the Downtown Seattle Transit Tunnel which houses several stops on Sound Transit's Link light rail line.

Westlake Center Plaza is located on the corner of 4th Avenue and Pine St and has a small, one-story (plus loft) retail pavilion. The plaza is covered in gray pavers and features several small trees. The retail space totals 870 sq ft (81 m) and is leased to Starbucks (it was previously leased to Seattle's Best Coffee).

• List of upscale shopping districts

• Official website

47°36′42″N 122°20′14″W / 47.61167°N 122.33722°W / 47.61167; -122.33722