1870 Massachusetts Census Index Please enable JavaScript in your browser to complete this form.Please enable JavaScript in your browser to complete this form.Your Email *EmailConfirm EmailFull Name You Want Searched *Helpful InformationSubmit This index lists approximately 1.38 million Massachusetts residents recorded in the 1870 U.S. census. The index is thorough, encompassing all counties within Massachusetts and providing the names of household leaders and every individual counted.