Of 14 counties in the Bay State, Middlesex County is fifth in terms of its size (846 square miles). Middlesex County is in Northeast Massachusetts. Recent listings of equestrian property for sale in Middlesex County, Massachusetts, totals 1,000 acres and a combined market value of nearly $4 million. The most common type of land for sale by combined acreage in Middlesex County is residential property. Browse all Middlesex County horse farms for sale on the Land Network to find the equestrian property that's right for your future needs, whether you're a horse breeder, equestrian business or simply horse lover looking for stable facilities, grooming pens or grazing pasture for your own horses. The most common type of land for sale by combined acreage in Middlesex County is residential property.