1.  Liahona Research (Orem, UT), compilers.  1996.  Marriage Index:  Ohio, 1789-1850.  (Broderbund CD-400):

Corbin, Elijah R.

Ely, Elizabeth

Mar 3, 1836

Knox Co.

"R." must be a misreading of "K."

2a.  Census Index:  U.S. Selected Counties, 1840 (Broderbund CD-316):

1840

Corbin, Erich

OH

Knox Co

Jackson Twp.

p. 403

I will be the first to grant that this census-enumerator had positively dreadful handwriting, but the first name was clearly "Elijah" (see next source).

2b.  1840 Census Index/Images (online at Ancestry.com, Image #7-8 of 12; extracted by Diana Gale Matthiesen):

1840

OH

Knox Co

Jackson Twp

Roll 406

pp. 402B-403A

Ln 7

Elijah Corbin

200 010 - 100 010

_______

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
2 males	4 or under	1835-1840	= John (b. 1836/7) = Benjamin (b. 1835)
1 male	20-29	1810-1820	= Elijah (b. 1814)
1 female	4 or under	1835-1840	= Martha (b. 1838/9)
1 female	20-29	1810-1820	= Elizabeth (b. 1817)

Listed three lines from Elizabeth's presumed father, John ELY. 

3.  1850 Census Index/Images (online at Ancestry.com; Image #13 of 24):  Waldo Town, Marion Co., OH, p. 7A, 90/90, enumerated 7 Sep 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):¤

Elijah Corbourn	35	M	Laborer	Pa
Elizabeth	33	F		Pa
Benjamin	13	M		O
Martha A	11	F		O
Thompson	8	M		O
William	6	M		O
David	4	M		O
Sarah	2	F		O
Samantha	4/12	F		O

Where are Joshua and James?

4.  1860 Census Images (online at Ancestry.com; Image #25 of 28):  Waldo P.O., Village of Waldo, Marion Co., OH, Roll M653_1006, p. 412A, PN 99, 711/711, enumerated 10 Jul 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):¤

Elijah K Corbin	44	M	Farm Laborer	150	25	Penn
Elizabeth   "	42	F				Do
John B      "	23	M	Carpenter			Ohio
Joshua M    "	20	M	Day Laborer			Do
James H     "	18	M	Do			Do
William Z   "	16	M	Do			Do
David W     "	14	M				Do
Sarah       "	12	F				Do
Margaret C  "	10	F				Do
Maria       "	8	F				Do
Elijah A    "	6	M				Do
Francis M   "	4	M				Do
Isaac N     "	8/12	M				Do

Could Samantha and Margaret be the same person?

5.  1870 Census Images (online at Ancestry.com; Image #4 of 7):  Waldo P.O., Village of Waldo, Marion Co., OH, p. 211B, PN 4, enumerated 8 Jun 1870, official enumeration date 1 Jun 1870 (extracted by Diana Gale Matthiesen):

25	27	Coleman Valentine	81	M	W	Farmer	500	1400	Pennsylvania
		_______ Magdalina	62	F	W	Keeping House			France
	28	Corbin	55	M	W	Day laborer			Pennsylvania
		______ Elizabeth	53	F	W	Keeping House			"
		______ Albert E	16	M	W				Ohio
		______ Francis M	14	M	W				"

Valentine COLEMAN's son, Wilson S. COLEMAN, married Maria Ann STRAUB, sister of George W. STRAUB, who married Elijah & Elizabeth CORBIN's daughter, Sarah E. CORBIN.  In other words, the COLEMANs and CORBINs are each other's in-laws.  These are the only CORBINs in the county, which is extraordinary considering how many children they had.

6a.  1880 Census:  Marion Twp., Marion Co., OH, p. 90 (extracted by Sharaon Moore):

Eli K. Corbin

M

66

inmate in infirmary

Married

Laborer

Pa

Pa

Pa

6b.  1880 Census:  Village of Waldo, Marion Co., OH, p. 122 (extracted by Sharon Moore):

Martha Bensley	F	41		Wid	keeping house	OH	PA	PA
[Martha's children]
Elizabeth Corbin	F	63	Mother	Mar	boarding	PA	PA	PA

Elizabeth is living with her widowed daughter, Martha (CORBIN) BENSLEY and her children.  They are living next door to John J. STRAUB, brother-in-law of Elizabeth's daughter, Sarah (CORBIN) STRAUB. 

7.  Jim & Barbara Midlam.  1976.  Marion County, Ohio, Cemetery Inscriptions:

CORBIN, Elizabeth E.	w/o E.K. d Mar 31 1888 Aged: 70y 8m 21d	Waldo [Cemetery]	Waldo [Twp.]
CORBIN, Elijah	1814 - 1894	Waldo [Cemetery]	Waldo [Twp.]
CORBIN, Isaac N.	d Jul 12 1864 Aged: 4y 6m 29d	Waldo [Cemetery]	Waldo [Twp.]
CORBIN, Mary M.	d. Jul 10 1862 Aged: 10y 2m 19d	Waldo [Cemetery]	Waldo [Twp.]
CORBIN, David U.	Co. C. 86th OVI	Waldo [Cemetery]	Waldo [Twp.]

8.  Birthdates calculated using Ben Buckner's JavaScript Birthday Calculator.

Entered		Result
31 Mar 1888	21d 8m 70y	10 Jul 1817
12 Jul 1864	29d 6m 4y	13 Dec 1859
10 Jul 1862	19d 2m 10y	21 Apr 1852
(Calculated birthdates should always be prefaced with "ca." — you can't be certain the person who calculated their age did it correctly.)

9.  Geo. W. Hawes.  1860.  Ohio State Gazetteer and Business Directory for 1860-'61.  2nd ed.  George W. Hawes Publ., Indianapolis, IN.  On p. 606, under the heading "Waldo":

Corbin E.K., township constable

10.  J. Wilbur Jacoby.  1907.  A History of Marion County, Ohio, and Representative Citizens.  Biographical Publ. Co., Chicago.  On p. 85:

Coroners... E.K. Corbin, Dem. 1861-1863

11.  Sharon Moore.  1996.  Marion County, Ohio, Poorhouse, 1856-1888:

Event	Mo	Day	Year	Last Name	First Name	Age	Township	Comment
Admitted	9	27	1878	Corbin	Elijah	65	Bowlinggreen	destitude
Left	5	4	1892	Corbin	E.K.			admitted 1878

12.  Broderbund.  World Family Trees.  Vol. 40, Pedigree No. 356 (submitter:  Karen L. McClellan).

Elijah was the first child of Joshua and Margaret Corbin.  He stayed in Ohio when his parents moved to Hamilton County, Iowa.  They did not hear anything more about him and do not know if he ever married or not, or where he spent the rest of his life. Source: Letter from Donald Rowe Corbin, Aug. 5, 1997

Has Elijah b. 1810 and d. 6 Sep 1895.