New Brunswick, also known as 'the Healthcare City' or 'Hub City', is a city and the county seat of the County of Middlesex, New Jersey. It is 31 miles southwest of New York City on the southern bank of the Raritan River about fifteen miles from its mouth. As of the 2000 Federal Census, the population of New Brunswick is 48,573. New Brunswick apartments for rent comparison page shows most up to date rent information on New Brunswick apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.