Most secondary sources give John & Mary (PEDDICORD) CORBIN as parents of our subject, but John & Mary are too young to be his parents. 
Father not:  John CORBIN, b. 1760 
Mother not:  Mary PEDDICORD, b. 1763 

— born in Clermont Co., OH:
3.  John CORBIN, b. 1806/7
4.  Prudence CORBIN, b. 1809/10
5.  James CORBIN, b. 1817/8
6.  Harriet CORBIN, b. 1818/9
7.  Rebecca CORBIN, b. ca. 1821 

1a.  Robert Barnes.  1978/93.  Maryland Marriages, 1778-1800.  Genealogical Publ. Co., Baltimore, MD (Broderbund CD-195).

p. xvi	3 HA - Marriage Licenses at Harford County Court House, Bel Air, transcribed by the author...
p. 45	Corbin, Nathan, 7 April 1800, Sophia Enloes 3 HA-29

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

Nathan CORBIN Spouse: Sophia ENLOES Marriage: 07 Apr 1800, Harford, Maryland Source: Marriage Licenses, 1774-1886. Harford County (Maryland). Clerk of the Circuit Court

2.  1800 Census Index and Digital Images (online at Ancestry.com; Image #4 of 12; extracted by Diana Gale Matthiesen):-•

1800

MD

Harford Co.

District 1

p. 7/73

Nathan Corbin

01101-00201-00

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	10-15	1784-1790	= Sibling
1 male	16-25	1774-1784	= Self: Nathan Jr (b. 1776)
1 male	45 or over	in or bef. 1755	= Father: Nathan Sr (b. 1738)
2 females	16-25	1774-1784	= Sibling = Wife: Sophia (b. 1777)
1 female	45 or over	in or bef. 1755	= Mother: Sarah (b. 1743)

Our subjects are newlyweds, living with the groom's parents and siblings.

3a.  Census Index:  U.S. Selected Counties, 1810 (Broderbund CD-313):  the 1810 census of Ohio was lost (except for Washington Co.).  Some tax lists are substituted on this CD, including ones from Clermont County, but there are no CORBINs in Ohio on this CD.

3b.  Clermont County Ohio — 1810 Tax List Index [link died] (online at the Clermont County OHGenWeb site; contributed by Hope Freeman Carnicle):  there are no CORBINs on this list.

4.  1820 Census Index and Digital Images (online at Ancestry.com; Image #4 of 12; extracted by Diana Gale Matthiesen):¤•

1820

OH

Clermont Co.

Ohio [now Monroe] Twp.

p. 31/60

Ln. 18

Nathan Corbin

110110-21010-0-200

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	9 or under	1810-1820	= James (b. 1817/8)
1 male	10-15	1804-1810	= John
1 male	19-25*	1794-1801	= Abraham (b. 1802)
1 male	26-44	1775-1794	= Nathan (b. 1776)
2 females	9 or under	1810-1820	= Harriet (b. 1818/9) = Prudence (b. 1809/10)
1 female	10-15	1804-1810	= Sarah (b. 1803)
1 female	26-44	1775-1794	= Sophia (b. 1777)
2	persons engaged in agriculture
*In the 1820 Census, the third column is age class 16-18 and the fourth column is age class 16-25; therefore, any individual in column three is duplicated in column four.  By subtracting the number in column three from the number in column four, you can create an age class "19-25."

Listed next to Nathan's brother, Abraham CORBIN. 

5.  1830 Census Index and Digital Images (online at Ancestry.com; Image #11 of 20; extracted by Diana Gale Matthiesen):¤•

1830

OH

Clermont Co.

Monroe Twp.

p. 233

Ln. 16

Nathan Corbin

001 000 010 - 000 200 020

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	10-14	1815-1820	= James (b. 1817/8)
1 male	50-59	1770-1780	= Nathan (b. 1776)
2 females	15-19	1810-1815	= Rebecca (b. 1821/2) = Harriett (b. 1818/9)
2 females	50-59	1770-1780	= Sophia (b. 1777) = ?

Listed next to their son, John CORBIN. 

6.  1840 Census Index and Digital Images (online at Ancestry.com; Image #9-10 of 20; extracted by Diana Gale Matthiesen):¤•

1840

OH

Clermont Co.

Monroe Twp.

Roll 384

pp. 203B-204A

Ln. 22

Nathan Corbin

000 010 001 - 000 020 001

0100000

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	20-29	1810-1820	= James (b. 1817/8)
1 male	60-69	1770-1780	= Nathan (b. 1776)
2 females	20-29	1810-1820	= Rebecca (b. 1821/2) = Harriet (b. 1818/9)
1 female	60-69	1770-1780	= Sophia (b. 1777)
1	person engaged in agriculture

Was Rebecca fibbing about her age in 1850?  Listed next to Abram ENLOWS, who is next to Nathan's nephew, Nicholas CORBIN, who is four lines from Nathan's son, John CORBIN. 

7.  1850 Census Index/Images (online at Ancestry.com; Image #43 of 46):  Monroe Twp., Clermont Co., OH, Roll 667, p. 22A, 323/323, enumerated 23 Oct 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):¤•

Nathan Corbin	74	M		Farmer	8500	Md
Sophia    "	73	F				Va
Harriet   "	30	F				Ohio
Rebecca   "	28	F				"

This doesn't appear to be Rebecca's correct age.  Listed next to son, James CORBIN. 

8.  1860 Census Images (online at Ancestry.com; Image #30 of 50):  Nicholsville P.O., Monroe Twp., Clermont Co., OH, Roll 945, p. 436B/869, PN 30, 228/223, enumerated 15 Jun 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):¤•

Nathan Corbin	83	M		Farmer	13,600	1650	Maryland
Wm Gardner	34	M		do			Ohio
Rebecca "	31	F		Domestic duties			do
Arminda "	13	F					do
Benjamin "	9	M					do

9.  1870 Census Images (online at Ancestry.com; Image #43 of 54):  Batavia P.O., Monroe Twp., Clermont Co., OH, p. 197A, 330/319, PN 43, enumerated 2 Aug 1870, official enumeration date 1 Jun 1870 (extracted by Diana Gale Matthiesen):¤•

Gardner William H	44	M	W	Farmer	3,720	2,140	Ohio
_______ Rebecca	53	F	W	Keeping House			Ohio
_______ Arminda	23	F	W	Help Mother			Ohio
_______ Benjamin E	19	M	W	Works on Farm			Ohio
Corbin Nathan	94	M	W	Lives with Daughter	16,750		Maryland
______ Marietta	9	F	W	attending School			Ohio

10.  LDS.  Family Search: Internet Genealogy Service:  AF - Ancestral File (online at FamilySearch.org).

11.  WorldConnect / Ancestry World Trees (online at RootsWeb.com/Ancestry.com).