Nabnasset is a village located in the northeastern portion of Westford, Massachusetts, between North Chelmsford, Tyngsboro, Graniteville and Westford Center.

The village is predominantly smaller homes near Nabnasset Lake, although there are no clear village boundaries. Here you can find much more affordable housing along with a strong neighborhood culture. Although the rumors, it is a relatively safe area with small amounts of crime. Coined "Vietnab" by the Westford Police Department for its steady stream of disturbances.

The Nabnasset area of Westford MA is known of its schools of Nabnasset Grade School (Old Nab) and Nabnasset Elementary School (Nab). The area also contains Edward's Beach, a beach to Nabnasset Lake located on Williams Road and is free to Westford residents but will cost non-residents $5.00.