1a.  Census Index:  U.S. Selected Counties, 1820 (Broderbund CD-314):

1820

Troutman, John

OH

Knox Co.

Chester Twp.

p. 86

See this page for the reasons this township is incorrect. 

1b.  Family Quest Archives:  Ohio Federal Census 1820:  Clark, Coshocton, Gallia, Hocking, Huron, Knox, Lawrence, Meigs, and Monroe Counties.  Heritage Quest CD M33-88 (extracted by Diana Gale Matthiesen).  In lower half of microfilm p. 135, which is true census page 18A: 

1820

OH

Knox Co.

Union Twp.

p. 86

John Troutman

101100-20010

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	9 or under	1810-1820	= Son A
1 male	16-18	1801-1804	= John? (b. 1789/90)
1 male	16-25*	1794-1804
2 females	9 or under	1810-1820	= Daughter B = Daughter A
1 female	26-44	1775-1794	= Elizabeth? (b. 1797)
*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.

John and Elizabeth both appear to be tallied in the wrong columns.  Is this really our family?  Yet, who else could it be?

Geographical Note:  in 1825, Harrison Twp. was formed from Union, Morgan, and Jackson Twps.

2.  Family Quest Archives:  Ohio Federal Census 1830:  Jackson, Jefferson, Knox, Lawrence, and Licking Counties.  Heritage Quest CD M19-134 (extracted by Diana Gale Matthiesen).

1830

OH

Knox Co.

Harrison Twp.

p. 222A

Troutman John

110 000 100 - 122 001 000

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	4 or under	1825-1830	= Son C
1 male	5-9	1820-1825	= Son B
1 male	40-49	1780-1790	= John (b. 1789/90)
1 female	4 or under	1825-1830	= Daughter D
2 females	5-9	1820-1825	= Mary (b. 1824/5) = Daughter C
2 females	10-14	1815-1820	= Daughter B = Daughter A
1 female	30-39	1790-1800	= Elizabeth (b. 1797)

3.  Family Quest Archives:  Ohio Federal Census 1840:  Knox County.  Heritage Quest CD M704-406 (extracted by Diana Gale Matthiesen):

1840

OH

Knox Co.

Harrison Twp.

p. 276

John Troutman

000 101 - 121 120 100

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	15-19	1820-1825	= Son B
1 male	30-39	1800-1810	= John (b. 1789/90)
1 female	4 or under	1835-1840	= Daughter E
2 females	5-9	1830-1835	= Ellen (b. 1834/5) = Amanda (b. 1831/2)
1 female	10-14	1825-1830	= Daughter D
1 female	15-19	1820-1825	= Mary (b. 1824/5)
2 females	20-29	1810-1820	= Daughter B = Daughter A
1 female	40-49	1790-1800	= Elizabeth (b. 1797)

John has been tallied in the wrong age class, yet I still think these are our subjects.

4.  Family Quest Archives:  Ohio Federal Census 1850: Knox County.  Heritage Quest CD M432-700:  Harrison Twp., Knox Co., OH, p. 408B, 2586/2648, enumerated 28 Sep 1850 (extracted by Diana Gale Matthiesen):

John Troutman	60	M	Farmer	6400	Penn
Elizabeth "	52	F			Ohio
Mary      "	25	F			do
Amanda    "	18	F			do
Ellen     "	15	F			do

It is unlikely that Elizabeth was born in Ohio.  Not only was 1798 extremely early for any settler to be in Ohio, her brothers, Hartman (b. 1799) & Peter (b. 1803), were born in PA, as I believe she was, too.