Southfield is a city in Oakland County of the US state of Michigan. It is a northern suburb of Detroit, MI. As of the 2010 census, the city had a population of 71,739. Southfield is adjacent to the city on the north side. A part of Metro Detroit's upscale office market, the city's marque is a cluster of five golden skyscrapers – known as the "Golden Triangle" – that form the contemporary 2,200,000 square feet (204,400 m²) Southfield Town Center office complex with a Westin Hotel and a conference center. In addition, a 33-story luxury residential high-rise is separate from the complex.