Emily is believed to be a daughter of Zilpha SMITH Mann and Samuel Mann. A female of Emily's age is enumerated in the 1820 and 1830 households of Samuel Mann at Penfield, Ontario Co., New York.

Emily married Chauncey G Armstrong circa 1835. She gave birth to at least 5 children named Mary, Joanna, James Henry, Matilda A, and Byron F Armstrong.

The 1840 household of C G Armstrong is enumerated at Rochester Twp., Lorain Co., Ohio. The census count is 001001-20001. Residing next door is the household of Saml Man.

Emily, Chancey and 5 children are enumerated in the 1850 census at Rochester, Lorain County. They are farming and the value of Armstrong real estate is $1300. The 1850 census data follows:
Chancey Armstrong M 42 NY
Emily Armstrong F 32 NY
Mary Armstrong F 13 OH
Joannah Armstrong F 11 OH
James Armstrong M 8 OH
Matilda Armstrong F 5 OH
Byron F. Armstrong M 1 OH

Emily, Chauncy and family are enumerated in the 1860 census at Rochester Township. They are farming. The real estate value of their property is $5000 and the personal property value is $1375. Residing in their household is Wm Armstrong, aged 44 years and born in New York.

Emily, Chancy and family are enumerated in the 1870 census at Rochester Township. They are farming. The real estate value of their property is $4400 and the personal property value is $650. Residing in their household is Willie Davis, aged 13 years and born in Ohio.

Emily, Channey and family are enumerated in the 1880 census at Rochester Township. They are farming. The birthplace of Emily's parents is Rhode Island. The birthplace of Channey's parents is New York. The 1880 census data follows:
Channey Armstrong Self M 71 NY
Emily Armstrong Wife F 62 NY
Matilda Armstrong Dau F 34 OH
Martha Powell Other F 46 NY
Emily Davis Granddau F 6 IN
Lorraine Armstrong Other F 22 IN

Emily died aged about 75 years.