Tap Seac Square, Central public square in São Lázaro district, Macau, China.

Tap Seac Square is a public plaza covering roughly 13,000 square meters (140,000 sq ft) in Macau, surrounded by yellow neoclassical buildings. The area houses the Central Library and Cultural Affairs Bureau alongside an open stone-paved space.

The site began as a swampy area with three large rocks that was converted into a football field during the 1920s. This transformation eventually led to its development into the current square in 2007.

The square's name comes from the three large rocks that once stood on the site, called "tap seac" in Cantonese. The eight neoclassical houses along Avenida do Conselheiro Ferreira de Almeida, known as the "Eight Houses," include the Cultural Affairs Bureau, Tap Seac Health Centre, Macau Central Library, Macau Archives, and Tap Seac Gallery. The glass-walled commercial centre, nicknamed the "Glass House," has hosted short exhibitions and the office for the cash handout scheme.

The plaza is within walking distance of Thai restaurants, cafes, a swimming pool, and vintage shops in the surrounding area. The stone-paved surface is easy to navigate and offers plenty of open space for strolling and sitting.

The square's underground car park holds over 60 tour buses, reached by a U-shaped tunnel 200 metres long and 8 metres wide. The tunnel was designed to serve a planned Light Rapid Transit station at Tap Seac that was later cancelled, and its tight ninety-degree turn was nicknamed the "Gate of Hell" by legislator Au Kam San.