— born in Decatur Twp., Mifflin Co., PA:
12.  Barnett STROUP, b. ca. 1814
13.  Hannah STROUP, b. ca. 1817 

1.  Marriage Record:

2.  1790 Census Index and Digital Images (online at Ancestry.com; Image #12 of 17; extracted by Diana Gale Matthiesen):¤•

1790

PA

Mifflin Co.

p. 123

Ln. 29

Phillip Stroup

1-1-1-0-0

These data indicate:

Gender and Type	Age Class	Therefore Born	Individuals Inferred
1 free white male	16 or over	in or bef. 1774	= Philip (b. 1760-65)
1 free white male	15 or under	1774-1790	= William (b. 1787/8 )
1 free white female	all ages	in or bef. 1790	= Margaret (b. 1771)

There is a John STROUP on the previous page and a George STROUPE on the next page. 

3.  1800 Census Index and Digital Images (online at Ancestry.com; Image #17 of 27; extracted by Diana Gale Matthiesen):¤•

1800

PA

Mifflin Co.

Derry [now Decatur] Twp.

p. 497

Ln. 6

Stroup Philip

40110-10100-00

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
4 males	9 or under	1790-1800	= Frampton (b. 1797/8) = Phillip (b. 1795) = John (b. 1793) = William (b. 1787/8)
1 male	16-25	1774-1784	= ?
1 male	26-44	1755-1774	= Philip (b. 1760-65)
1 female	9 or under	1790-1800	= Elizabeth (b. 1791)
1 female	16-25	1774-1784	= ?

Margaret appears to be deceased, and there appears to be a young couple living with the family, perhaps kin or hired help. Certainly, with five children under ten years of age, Philip would have needed domestic help.  The only other STROUP/STRAUB/etc. in Mifflin Co. is David STROUP in Armagh [later Brown] Township.  The list is roughly alphabetized, so no neighborhood reconstruction is possible.

3.  1810 Census Index and Digital Images (online at Ancestry.com; Image #3 of 5; extracted by Diana Gale Matthiesen):¤•

1810

PA

Mifflin Co.

Derry [now Decatur] Twp.

p. 1031

Ln. 2

126. Philip Stroup

42111-10010-00

30 100 0 0 1 20 6 20 0 0 20

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
4 males	9 or under	1800-1810	= Abraham (b. ca. 1809) = Son C = Son B = Son A
2 males	10-15	1794-1800	= Frampton (b. 1797/8) = Phillip (b. 1795)
1 male	16-25	1784-1794	= John (b. 1793)
1 male	26-44	1765-1784	= ?
1 male	45 or over	in or bef. 1765	= Philip (b. 1760-65)
1 female	9 or under	1800-1810	= Daughter A
1 female	26-44	1765-1784	= Susan (b. 1765-75)
30 yds	Woollen Cloth
100 yds	Flaxen Cloth
0	Cotton Cloth
0	Hempen Cloth
1	Spinning Wheels
20	Common Sheep
6	Horses
20	Cattle
0	Looms
0	Hand Cards
20	Sugar

4.  1820 Census Index and Digital Images (online at Ancestry.com; Image #1 of 2; extracted by Diana Gale Matthiesen):¤•

1820

PA

Mifflin Co.

Decatur Twp.

p. 204

Philip Stroup

210101-10001-0-200

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
2 males	9 or under	1810-1820	= Barnett (b. ca. 1814) = Simon (b. 1811)
1 male	10-15	1804-1810	= Abraham (b. ca. 1909)
1 male	19-25*	1794-1801	= ?
1 male	45 or over	in or bef. 1775	= Philip (b. 1760-65)
1 female	9 or under	1810-1820	= Hannah (b. 1817)
1 female	45 or over	in or bef. 1775	= Susan (b. 1765-75)
2	person 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 one line below son, John STROUP, who is listed six lines below son, William STROUP. 

5.  1830 Census Index/Images (online at Ancestry.com; Image #1 of 8; extracted by Diana Gale Matthiesen):¤•

1830

PA

Mifflin Co.

Decatur Twp.

p. 493

Ln. 3

Philip Stroup

100 001 001 - 000 010

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	4 or under	1825-1830	= grandson?
1 male	30-39	1790-1800	= ?
1 male	60-69	1760-1770	= Philip (b. 1760-65)
1 female	20-29	1800-1810	= daughter? or daughter-in-law?

Looks like Philip is being cared for by one of his married children.  Listed one line below son, John STROUP.  Philip's son, William STROUP, is listed on the next page. 

6.  Census Index:  U.S. Selected Counties, 1840 (Broderbund CD-316):  Philip not found, as expected.

7.  1850 Census Index/Images (online at Ancestry.com; Image #3 of 26):  Decatur Twp., Mifflin Co., PA, p. 306A, 20/20, enumerated 9 Dec 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):¤•

John Stroup	57	M		Farmer	5000	Pa
[John's wife and children, et al.]
Frampton Stroup	52	M				Pa	Idiot

Listed two households from their brother, Simon STROUP.

8.  Samuel Sterrett.  1886.  "Decatur Township."  Chap. XVI, pp. 654-659 in Franklin Ellis, ed. History of That Part of the Susquehanna and Juniata Valleys Embraced in the Counties of Mifflin, Juniata, Perry, Union and Snyder. Philadelphia (online in the archives of USGenWeb):

p. 654	The following is the assessment of Decatur township in 1815, and gives the names of owners of real estate, number of acres and mills in the township at that time... Philip Stroup, 240; William Stroup, 300...
p. 655	The family of Stroup were early settlers in the territory of Derry township (now Decatur).  Philip and William Stroup were warrantees, and their descendants are living in the county...

William is Philip's son.  See son John's page for the full excerpt.

9.  Archives of the STRAUB-L Mailing List (online at RootsWeb.com), especially messages from Jim Burnell.

10.  Messages in the Stroup Family Genealogy Forum (online at GenForum.com).

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

12.  WorldConnect / Ancestry World Trees (online at RootsWeb.com/Ancestry.com).  A file there states that William FRAMPTON (who died in 1820) left bequests to the children of his late daughter, Margaret (FRAMPTON) STROUP, wife of Philip STROUP, who were: William, Elizabeth, Phillip, John, and Frampton STROUP.