US, UK, and Canadian census records. Ancestry.com has searchable indexes; database results and some digitized images are available with a fee-based subscription. Free articles and helpful research materials.
AIS indexes. Original source: Jackson, Ron V., Accelerated Indexing Systems, comp.. Massachusetts Census, 1790-1890 [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 1999. Original data: Compiled and digitized by Mr. Jackson and AIS from microfilmed schedules of the U.S. Federal Decennial Census, territorial/state censuses, and/or census substitutes.
New Horizons Genealogical Services has launched the Massachusetts State Census Transcription Project, it is our goal to get the whole Massachusetts census and mortality schedules transcribed and published on the internet. We have links on our site to most known records already transcribed.
The Massachusetts 1840 Census of Pensioners for Revolutionary or Military Services with their names, ages, and places of residence, as returned by the marshals of the several Judicial Districts, under the act for taking the sixth census.