Joel is a son of James (b.Trumbull Co, OH) and Jane Elizabeth (Foote) Bentley (b.IA) [mother's name is Temperance. Jane Elizabeth was his wife's name].
He was a widower (Jane Elizabeth Bentley) at the time of his death.
occupation: Farmer & Merchant, Retired
Informant: Mrs E Funk (daughter), Sterling, Colorado
DC 35880 (Image)

Joel appears on these two Censuses with his parents:
1850/ Ohio/ Trumbull
James BENTLY, 51y b.PA, occ: Farmer
Temperance, 50y b.CT
Anson, 25y b.OH, occ: Farmer
Eveline, 20y b.OH
Martin V, 17y b.OH, occ: Farmer
Benj F, 13y b.OH
Joel B, 9y b.OH
Mary, 85y b.PA
Sam'l Woodbridge, 30y b.OH, occ: Farmer
Caroline Woodbridge, 23y b.OH
residence: Brookfield

1860/ Ohio/ Trumbull
Jas BENTLY, 62y b.PA, occ: Farner
Temperance, 60y b.CT
Joel, 19y b.OH
Benj, 23y b.OH, occ: Farmer
Lena Earnest, 16y b.OH

DETAILED SOLDIER RECORD
BENTLEY, JOEL B
Regiment Name: 4th Regiment, Missouri State Militia Cavalry
Side: Union
Company: C
Soldier's rank in:  Private
Soldier's rank out: Corporal
Alternate Name: Joel B Bently
General Note: Original filed under Joel B Bently
Film Number M390 ROLL 3
http://www.nps.gov/civilwar

Record of Marriage
groom: Joel B BENTLY
bride: Elizabeth J Foot
date: 29 November 1868
place: Nodaway County, Missouri
"Missouri Marriages, 1750-1920"
FamilySearch (no image available)

1870/ Missouri/ Nodaway
Joel Bentley, 28y b.OH, occ: Farmer
Elisabeth, 17y b.IA

1880/ Missouri/ Nodaway
h/ Joel B Bentley, 39y b.OH, occ: Farmer
w/ Elizabeth J, 24y b.IA
d/ Sarah, 10y b.MO
d/ Caroline, 6y b.MO
d/ Eda B, 3y b.MO
s/ James M, 1y b.MO

1900/ Missouri/ Nodaway
h/ J B BENTLY, 60y b.Dec 1840 OH, Wd, occ: Lumber & furniture Merchant
d/ Eda B, 23y b.Dec 1876 MO
s/ William, 21y b.Feb 1879 MO, occ: Salesman
s/ Martin L, 19y b.Oct 1881 MO

1910/ Missouri/ Nodaway
h/ Joel B Bentley, 69y b.OH, Wd, occ: own income
d/ Edabell, 33y b.MO, no occ