Isaac was married to Miss Lydia Lamb.

U.S. and International Marriage Records, 1560-1900
Name: Isaac Mccown
Gender: Male
Birth Place: TN
Birth Year: 1809
Spouse Name: Lidia Lamb
Spouse Birth Place: NC
Spouse Birth Year: 1809
Marriage Year: 1829
Marriage State: IN
Number Pages: 1

1840 United States Federal Census :
Name: Isaac Mcpares [Isaac Mccown]
Home in 1840 (City, County, State): McDonough, Illinois
Free White Persons - Males - Under 5: 1
Free White Persons - Males - 5 thru 9: 1
Free White Persons - Males - 30 thru 39: 1
Free White Persons - Females - Under 5: 1
Free White Persons - Females - 5 thru 9: 1
Free White Persons - Females - 30 thru 39: 1
Persons Employed in Agriculture: 1
Free White Persons - Under 20: 4
Free White Persons - 20 thru 49: 2
Total Free White Persons: 6
Total All Persons - Free White, Free Colored, Slaves: 6

1860 United States Federal Census :
Name: Isaac Mccowan
Age in 1860: 51
Birth Year: abt 1809
Birthplace: Tennessee
Home in 1860: Chalmers, McDonough, Illinois
Gender: Male
Post Office: Colchester
Household Members: Name Age
Isaac Mccowan 51
Lidia Mccowan 51
Lavinia C Mccowan 17
Jasper Mccowan 19
Lafatte Mccowan 14
Andrew J Mccowan 11

1880 United States Federal Census :
Name: Isac Mccowan
Age: 71
Birth Year: abt 1809
Birthplace: Tennessee
Home in 1880: Colchester, McDonough, Illinois
Race: White
Gender: Male
Relation to Head of House: Self (Head)
Marital Status: Married
Spouse's Name: Lidia Mccowan
Father's Birthplace: Virginia
Mother's Birthplace: England
Occupation: Farmer
Household Members: Name Age
Isac Mccowan 71
Lidia Mccowan 71

His Calculated Birthdate was April 17, 1809.

Isaac McCown was 73 years 10 months 5 days old when he passed away.

Death Notice in part from
The Macomb Journal
Feb. 22, 1883 :
Isaac McCown, an old settler of McDonough County, died at his home 2 1/2 miles southeast of Colchester yesterday.