George is said to have been born in Mount Sterling, Madison Co., but his parents were in the 1840 Census of Muskingum Co.  It is also said he died in Columbus, but he was living in Madison Co. in the 1910 census.

This record is hard to figure.  Ellen was apparently only 15 years old and full-term pregnant when she married George.  Did she really marry a John MOORE when only 14 years old?  Or did John knock her up?  Did he then die?  Or did John leave Ellen because she had relations with George?  Or was George simply "rescuing" his step-sister from being an unwed mother?  As Carrie was born after Ellen's marriage to George, she would have been legally George's daughter, but presumably John MOORE was her biological father.  Update:  secondary sources insist she did marry John and that he deserted her.

— born in Franklin Co., OH:
  2.  Charles CORBIN, b. b. 4 Mar 1874  {1880: 6, OH}
  3.  George Edward CORBIN, b. 19 Apr 1876  {1880:  4, OH}
  4.  Josiah [Joseph?] CORBIN, b. 18 Aug 1878  {1880: 2, OH}

— born in OH:
  5.  Seymour CORBIN, b. 12 Aug 1880
  6.  John Henry CORBIN, b. 12 Jan 1883
  7.  Grover D. CORBIN, b. 20 Mar 1885
  8.  Elmore CORBIN, b. 12 Apr 1887
  9.  Clifford C. CORBIN, b. 11 Sep 1889
10.  La Fayette / Lafayette CORBIN, b. 25 Nov 1891  {1910: 18, OH}
11.  Brice Thurman CORBIN, b. 4 Sep 1893, Amity, Madison Co., OH 
12.  Early CORBIN, b. 25 May 1895

1a.  Jordan R. Dodd, ed.  1998.  Marriage Index: Ohio, 1851-1900.  Liahona Research, Orem, UT (Broderbund CD-236):  not found.

1b.  LDS.  Family Search: Internet Genealogy Service:  IGI - International Genealogical Index (online at FamilySearch.org).

George W. CORBIN Spouse: Ellen MOORE Marriage: 17 Oct 1867, Delaware, Ohio Source: Marriage Records, 1835-1951. Ohio. Probate Court (Delaware County).

George W. CORBIN Spouse: Ellen SHERRY Marriage: 17 Oct 1867, Delaware, Ohio Source: patron submission

Carrie Evelyn CORBIN Birth: 2 Nov 1867, Delaware, Delaware, Ohio Father: George Washington CORBIN; Mother: Ellenora SHERRY Source: patron submission

Joseph CORBIN Birth: 18 Aug 1878, Amity, Madison, Ohio Father: George W. CORBIN; Mother: Ellen SHERRY Source: patron submission

Brice Thurman CORBIN Birth: 4 Sep 1893, West Canaan, Madison, Ohio Father: George Washington CORBIN; Mother: Ellen Nora SHERRY Source: [patron submission]

Bases on the censuses, the family was in Franklin Co., not Madison Co., between 1870 and 1880.

2.  1870 Census Images (online at Ancestry.com; Image #52 of 67):  Columbus P.O., Franklin Twp., Franklin Co., OH, p. 480A, 306/331, enumerated 20 Jun 1870 (extracted by Diana Gale Matthiesen):

Corbin George W	28	M	W	Working in Quarry		150	Ohio
______ Ellen M	17	F	W	Keeping House			Ohio
______ Sarah E	2	F	W				Ohio

3.  1880 Census Images (online at Ancestry.com; Image #11 of 82):  Franklin Twp., Franklin Co., OH, p. 129A, PN 11, SD 5, ED 7, enumerated 9 Jun 1880 (extracted by Diana Gale Matthiesen):

1880:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).

1

2

3

4

5

6

8

9

10

13

21

24

25

26

87

87

Corbin George

W

M

38

/

Farmer

OH

MD

MD

______ Ellen N

W

F

26

Wife

/

Keeping house

OH

OH

OH

______ Carrie

W

F

12

Daughter

/

At House

/

OH

OH

OH

______ Charles

W

M

6

Son

/

OH

OH

OH

______ George

W

M

4

Son

/

OH

OH

OH

______ Josiah

W

M

2

Son

/

OH

OH

OH

Corbin Jerome

W

M

19

half Brother

/

Laborer

OH

MD

MD

Frazelle Charles

W

M

25

Boarder

/

Laborer

OH

VA

OH

Living two doors down from George's brother, Thurman "Thomas" CORBIN, who is living next door to their sister,  Sarah Jane (CORBIN) FETHER. 

4.  1890 Census:  destroyed.

5.  1900 Census Index/Microfilm (online at Genealogy.com):  I'm going nuts trying to find him in 1900.  He's certainly not indexed as head-of-household.  Did find son, Seymour, who is living with his brother, George Edward.

6.  1910 Census Images (online at Ancestry.com; Image #22 of 30):  Fairfield Twp., Madison Co., OH, p. 121B, SN 11B, SD 6, ED 81, enumerated 9 May 1910 (extracted by Diana Gale Matthiesen):

1910:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).
1	2	3	4	5	6	7	8	9	10	11	12	13	14	17	18	19	20	23	24	26	27	28	30
194	194	Corbin G.W.	Head	M	W	69	M1	42	12	11	OH	PA		Eng	Farmer	Small Farm	OA	Y	Y	O	M	F	?
		______ Ellen	Wife	F	W	58	M2	42	12	11	OH	IRE	OH	Eng				Y	Y
		______ La Fayette	Son	M	W	18	S				OH	IRE	OH	Eng	Laborer		W	Y	Y

Columns 10 and 11 should only have been filled out for the wife, but here it seems Ellen's first child is being claimed by George.  Well, at least this record appears to confirm that Ellen was married twice, assuming she was telling the truth to the census-taker (not actually a safe assumption with matters this delicate).  In any case, she is maintaining that she was married before.

7.  Anon.  1880.  History of Franklin and Pickaway Counties, Ohio.  Williams Bros., Cleveland, OH (Broderbund CD-450).  On p. 130:

NINETY-FIFTH REGIMENT OHIO VOLUNTEER INFANTRY... COMPANY E... PRIVATES... William D. Corbin... George W. Corbin...

George and William D. CORBIN are brothers. 

8.  Messages in the Corbin Family Genealogy Forum (online at GenForum.com).

9.  Broderbund.  World Family Trees.  Vol. 12, Pedigree #1298.  Has "Ellenora SHERRY" married first to John MOORE, about whom nothing is known.