Ayer, Massachusetts, is a small town located in Middlesex County. It was incorporated in 1871 and has a rich history tied to the railroad industry. The town is known for its scenic landscapes and is part of the Greater Lowell area, making it a convenient location for commuters. The population of Ayer is around 7,000 residents, and it covers an area of approximately 3.5 square miles. Ayer is home to several parks and recreational areas, including Nashua River Rail Trail, which offers opportunities for walking, biking, and enjoying nature.