The county was created by the Massachusetts General Court on May 10, 1643, when it was ordered that "the whole plantation within this jurisdiction be divided into four sheires". Middlesex initially contained Charlestown, Cambridge, Watertown, Sudbury, Concord, Woburn, Medford, Wayland, and Reading.[4] In the late 19th century and early 20th century, Boston annexed several adjacent cities and towns including Charlestown and Brighton from Middlesex County, resulting in an enlargement of Suffolk County. On April 19th, 1775, it became the site of the first armed conflict of the American Revolutionary War.

Wikipedia : Middlesex County, Massachusetts

Projects

Cities and Towns

Cities are in capital letters. * indicates County Seat

Acton | Arlington | Ashby | Ashland | Ayer | Bedford | Belmont | Billerica | Boxborough | Burlington | CAMBRIDGE* | Carlisle | Chelmsford | Concord | Dracut | Dunstable | EVERETT | Framingham | Groton | Holliston | Hopkinton| Hudson | Lexington | Lincoln | Littleton | LOWELL* | MALDEN | MARLBOROUGH | Maynard | MEDFORD | MELROSE | Natick | NEWTON | North Reading | Pepperell | Reading |Sherborn | Shirley | SOMERVILLE | Stoneham | Stow | Sudbury | Tewksbury | Townsend | Tyngsborough | Wakefield | WALTHAM | WATERTOWN | Wayland | Westford | Weston | Wilmington | Winchester | WOBURN

Military

• American Revolution: Battles of Lexington and Concord

Specific Families

• Bigelow, John, of Watertown
• Shattuck Family, of Boston and Watertown