National Register of Historical Places - Middlesex County
- Provides a listing of properties, districts, lodgings and landmarks in the county. Includes architectural style and period of historical significance.
- http://www.nationalregisterofhistoricplaces.com/MA/Middlesex/state.html

The Political Graveyard: Middlesex County
- A database of political history and cemeteries, with brief biographical entries from the 1700s to the present.
- http://politicalgraveyard.com/geo/MA/MI5.html

The Guidance Center, Inc.
- Promotes the developmental and emotional health of Cambridge and Somerville area children and their families. Highlights of their programs and services, with newsletter.
- http://www.gcinc.org/

Mount Auburn Cemetery
- A garden cemetery founded in 1831 and now a National Historic Landmark. Located in Cambridge and Watertown.
- http://www.mountauburn.org/

The Jericho Road Project
- Matches resources of First Parish of Concord with the needs of community based organizations and small businesses in Lowell. Offers highlights of available services.
- http://www.jerichoroadproject.org/

Acton and Boxborough Special Education Parent Advisory Council
- Contains information about the council, a calendar of events, and links to resources for the special education communities of Acton and Boxborough.
- http://www.abspedpac.org/

Middlesex County QuickFacts from the U.S. Census Bureau
- Table of statistics with county comparison to state numbers.
- http://quickfacts.census.gov/qfd/states/25/25017.html

Middlesex County Newspaper Abstracts
- Collection of social, political, and criminal news stories transcribed from newspapers of the 19th to early 20th century.
- http://www.rootsweb.com/~mamidnws/

Concord-Carlisle Youth Collaboration Project
- A comprehensive, searchable database of youth resources and youth events in Concord and Carlisle, Massachusetts and the surrounding area.
- http://www.cc4youth.colonial.net

Middlesex CountyGenealogy
- Part of the USGenweb project for Middlesex County, Massachusetts with links to cities and towns within the county where people will do lookups for you and you can learn about the history of the area.
- http://www.rootsweb.com/~mamiddle/

Middlesex County Cemetery Directory
- Topographical directory or listing of cemeteries in Middlesex County Massachusetts
- http://www.mass-doc.com/middlesex_county_cemetery_guide.htm

Cemeteries of Middlesex County
- Links to individual cemeteries with directory of gravestone markers.
- http://www.interment.net/us/ma/middlesex.htm