Lesley,
This is what I found in the 1880 Census based upon the info you supplied. Some look like pretty definite matches and others will require a little more research to be sure, but it's at least a place to start.
Census Place: Washington, Pottawattamie,
Iowa Source: FHL Film 1254361 National Archives Film T9-0361 Page 54B
Relation Sex Marr Race Age Birthplace
Mary BROWN Self F W W 68 KY
Occ: Keeping House Fa:
KY Mo:
KYCora
GRAVES Dau F M W 20 IA
Occ: Keeping House Fa:
KY Mo:
KYHiram
GRAVES SonL M M W 31 IA
Occ: Farming Fa:
YORK S Mo: ---
Thadius
GRAVES Other M S W 4 IA
Fa: IA Mo: IA
Jasper
GRAVES Other M S W 1 IA
Fa: IA Mo: IA
Census Place: Washington,
Adair,
Iowa Source: FHL Film 1254325 National Archives Film T9-0325 Page 38A
Relation Sex Marr Race Age Birthplace
George A. BROWN Self M M W 39 IA
Occ: Farmer Fa: VT Mo:
KYLaura BROWN Wife F M W 32 IA
Occ: Keeping House Fa: OH Mo: VA
Thomas D. BROWN Son M S W 11 IA
Occ: At Home Fa: IA Mo: IA
Alice C. BROWN Dau F S W 7 IA
Occ: At Home Fa: IA Mo: IA
Edward BROWN Son M S W 4 IA
Occ: At Home Fa: IA Mo: IA
Estella BROWN Dau F S W 2 IA
Occ: At Home Fa: IA Mo: IA
Manoah
JINKINS Other M S W 17 IA
Occ: Farm Laborer Fa: OH Mo: IN
Census Place: 6th
Ward,
Burlington, Des Moines,
Iowa Source: FHL Film 1254337 National Archives Film T9-0337 Page 302D
Relation Sex Marr Race Age Birthplace
Levi BROWN Self M M W 36 IA
Occ: Labourer Fa: VT Mo:
KYElizebth BROWN Wife F M W 35 IA
Occ: Keeping House Fa: OH Mo: OH
William BROWN Son M W 15 IA
Fa: IA Mo: IA
Census Place: Warren, Wayne,
Iowa Source: FHL Film 1254369 National Archives Film T9-0369 Page 346C
Relation Sex Marr Race Age Birthplace
William
GASTON Self M M W 49 OH
Occ: Grocer Fa: PA Mo: PA
Elizabeth
GASTON Wife F M W 45 IN
Occ: Keeping House Fa:
KY Mo: VA
William J. GASTON Son M S W 25 IN
Occ: At Home Fa: OH Mo: IN
Mary O. GASTON Dau F S W 14 IA
Occ: At Home Fa: OH Mo: IN
Samuel
GASTON Son M S W 10 IA
Occ: Attending School Fa: OH Mo: IN
Jasper BROWN SonL M M W 27 IA
Occ: R.R. Laborer Fa: --- Mo: ---
Martha BROWN Dau F M W 22 IN
Occ: At Home Fa: OH Mo: IN
Census Place: District 1,
Putnam,
Tennessee Source: FHL Film 1255275 National Archives Film T9-1275 Page 81A
Relation Sex Marr Race Age Birthplace
Elijah
JUDD Self M M W 43 TN
Occ: Farmer Fa: TN Mo: VA
Mary
JUDD Wife F M W 38 TN
Occ: Keeping House Fa: VA Mo: VA
E.M. JUDD Son M S W 15 TN
Occ: Works On Farm Fa: TN Mo: TN
Mary B. JUDD Dau F S W 14 TN
Fa: TN Mo: TN
Virginia
JUDD Dau F S W 11 TN
Fa: TN Mo: TN
J.W. JUDD Son M S W 7 TN
Fa: TN Mo: TN
John F. JUDD Son M S W 5 TN
Fa: TN Mo: TN
G.F. JUDD Dau F S W 2 TN
Fa: TN Mo: TN
Good luck in your search,
Mary Beth
Sunderhausmarybeth_sunderhaus@yahoo.com