Project City Center - (spelled Project CityCenter) will be a 66 acre mixed use development project proposed by MGM / MIRAGE on the Las Vegas Strip.   The development will be on the site of the now imploded Boardwalk Hotel and Casino and adjoining land between the Bellagio and the Monte Carlo, and will be connected to these resorts via a state-of-the-art people mover system.

Project CityCenter is proposed as the largest privately financed development in the United States, and is one of several proposed mixed use projects on the Las Vegas Strip. The total cost of the project is expected to exceed $7 billion. MGM MIRAGE estimates that Project CityCenter will open in the fourth quarter of 2009. Unlike other themed resorts along the Las Vegas Strip, plans include multiple high-rise buildings with contemporary urban design.

The original cost estimate was $4 billion, but had been pushed up by rising construction costs and earlier design changes. MGM MIRAGE expects to build over 2,800 condo-hotel and condominium units, a large increase from initial plans which called for 1,650 units. The previously announced Mandarin Oriental, Las Vegas hotel at CityCenter will include 400 hotel suites as well as more than 200 condominium units designed to appeal to an international demographic. Two 400-unit condo towers, located in the middle of the CityCenter site and above several floors of retail space, are designed for younger demographic who desire living in an urban environment. CityCenter will also include a 4,000-room resort hotel designed by world renowned architect Cesar Pelli, and more than 500,000 square feet of retail space. The other condo buildings include a condo-hotel with about 300 apartments and a bigger tower with about 1,500 condo-hotel units.

The multi-use project is being designed with green technologies to make it one of the world's largest environmentally sustainable urban communities. Plans include garden roofs, the use of reclaimed water, and an on-site power plant. MGM Mirage will pursue LEED certification for the project as outlined by the U.S. Green Building Council. MGM MIRAGE has reached a $100 million agreement with Siemens to design and build a central energy plant to help power and cool Project City Center.

Project City Center's retail district is being planned by Bloomfield Hills, Mich.-based Taubman Centers, Inc, a high-end retail developer. MGM MIRAGE in keeping the company's long-standing commitment to diversity, have announced that they are going to include minority, and women owned businesses in the retail district of Project City Center.