Married first Marcia Clark. He had Walter (born 1860 in Wisconsin), Mary Martha (born 1861 in New York), and Harry (born 1863 in New York) with her. John the married Elina (born 1850 in Iowa). With her he had Florence (born June 4, 1874 in New York), Grace (born 1876 in Michigan), and Kate (born 1880 in Michigan). John was widowed.

John is buried in Chicago, but I don't know the name of the cemetery.

1870 census Iowa
James Galvin M 12 New York
John Ashton M 40 Pennsylvania
Walter Ashton M 10 New York
Harry Ashton M 5 New York
Mary M Ashton F 7 New York
Robt Welsch M 20 Iowa
Wm S Mcwhorter M 20 Ireland
Jas Landower M 23 Germany
John Becker M 22 Illinois
W H Bell M 30 Illinois
J Anderson M 20 New Jersey
Thos Lawrence M 45 England
Thos J Hughes M 25 Indiana
S C Cooper M 33 Indiana
D Dana M 25 Massachusetts
Edwd Greusel M 22 Illinois
John Greusel M 17 Illinois
Geo Waters M 35 New York
Chas Pelling M 45 England
Henry Fichtner M 30 Germany
Wm Gorman M 24 Ireland
Wm F Metcalf M 28 Canada
C W Jackson M 56 Pennsylvania
W Wood M 25 Illinois
Theo Yetts M 22 Missouri
John Crasin M 23 Illinois
John Croatch M 23 United States
J S Shay M 28 Missouri
J W Harris M 25 Missouri
Oliver Newton M 40 Massachusetts
J S Gordon M 17 Iowa

1880 census St. Louis
Jno Ashton Self M 49 Pennsylvania, United States
Elina Ashton Wife F 30 Iowa, United States
Walter Ashton Son M 20 Wisconsin, United States
Matha Ashton Daughter F 19 New York, United States
Harry Ashton Son M 17 New York, United States
Florence Ashton Daughter F 6 New York, United States
Grace Ashton Daughter F 4 Michigan, United States
Kate Ashton Daughter F 0 Missouri, United States

1880 census St. Louis
John Ashton Self M 48 Pennsylvania, United States
Lina Ashton Wife F 30 Iowa, United States
Walter Ashton Son M 21 Wisconsin, United States
Maytie Ashton Daughter F 18 New York, United States
Harry Ashton Son M 16 New York, United States
Florence Ashton Daughter F 7 New York, United States
Gracie Ashton Daughter F 4 Michigan, United States
Catharine Ashton Daughter F 1 Missouri, United States

They're on the 1880 census twice.

Walter's death certificate says he was born October 15, 1858 in Forestville, Wisconsin to John Ashton and Marcia Clark. Walter married Theresa. He died May 15, 1924 in Sarasota, Florida.

1920 St. Louis
Walter I Ashton Head M 60 Wisconsin
Theresa Ashton Wife F 55 Iowa