Our subject is "Casper Jr." in the 1850 census, then "Joseph" in the 1860, 1870, and 1880 censuses.

1.  Wisconsin Marriages, pre-1907 (online at Ancestry.com):

Name	Marriage Date	County	Volume	Page
Joseph Straub	22 Nov 1870	Fond Du Lac	2	165
Anna Prirsoh	22 Nov 1870	Fond Du Lac	2	165

"Prirsoh" could easily be a misreading of Kirsch, but good grief.  Can't find a second marriage for him.

2.  1870 Census:  Joseph is still living with his parents.

3.  1880 Census Every-Name-Index/Images (online at Ancestry.com, Image #16-17 of 47):  Ashford [Twp.], Fond du Lac Co., WI, Roll T9_1425, pp. 26D-27A, PN 16-17, SD 1, ED 31, enumerated 9 Jun 1880, official enumeration date 1 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

7

8

9

10

11

13

24

25

26

118

120

Straub Joseph

W

M

33

Husband

/

Farmer

Ohio

Do

Do

______ Anna

W

F

32

Wife

/

Keeping House

Germany

Germany

Germany

______ Joseph

W

M

8

Son

/

Attending School

Wisconsn

Ohio

Do

______ John

W

M

6

Son

/

"        "

"

"

"

______ George

W

M

6/12

Nov

Son

/

At Home

"

"

"

[next page]

118

120

Hanch Magdalena

W

F

70

Mother in Law

/

Retired

Germany

Germany

Germany

The "Do's" for Joseph parents' birthplaces was ditto-ing "Switz" from the above family, which we know is not correct because Joseph's parents were born in Wuerttemberg.  Listed next to Joseph's widowed mother, "Agnes" STRAUB. 

4.  1890 Census:  the 1890 Census Population Schedules were destroyed.

5a.  1900 Census Every-Name-Index/Images (online at Ancestry.com, Image #23 of 29):  Auburn Town[ship], Fond du Lac Co., WI, Roll T623-1788 (Book 2), p. 44A, SN 12, SD 3, ED 16, enumerated 18 Jun 1900, official enumeration date 1 Jun 1900 (extracted by Diana Gale Matthiesen):¤•

1900:  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	11	12	13	14	15	16	17	19	20	22	23	24	25	26	27	28
218	218	Straub Hannah	Head	W	F	Jul 1846	53	W	2	1	Ger	Ger	Ger	1852	47	Farmer	0	Y	Y	Y	O	F	F	188
		______ George	Son	W	M	Nov 1879	20	S			WI	OH	Ger			Farm Laborer	0	Y	Y	Y

Listed next to Alvin RANCH/RAUCH.

5b.  1900 Census Every-Name-Index/Images (online at Ancestry.com, Image #7 of 36):  Ashford Town[ship], Fond du Lac Co., WI, Roll T623_1788 (Book 2), p. 18A, SN 4, SD 9, ED 15, enumerated 5 Jun 1900, official enumeration date 1 Jun 1900 (extracted by Diana Gale Matthiesen):¤•

1900:  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	13	14	15	19	22	23	24	25	26	27	28
61	61	Straub Joseph	Head	W	M	Mar 1872	28	M	3	WI	OH	WI	Farmer	*	*	Y	O	M	F	57
		[Joseph's wife and children et al.]
		Straub John	Laborer	W	M	Sep 1873	26	S		WI	OH	WI		Y	Y	Y

*unreadable

6.  1910 Census Index/Images (online at Ancestry.com, Image #13 of 21):  Auburn Twp., Fond du Lac Co., WI, Roll T624_1712 (Part 1), p. 41B, SN 7B, SD 5, ED 41, enumerated 28 Apr 1910, official enumeration date 15 Apr 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	15	17	18	19	20	23	24	25	26	27	28	29
141	141	Straub George J	Head	M	W	30	M1	8			Wisconsin	Ohio	Ger-Ger		Eng	Farmer	General farm	Emp	Y	Y		O	F	F	141
		[George's wife and children]
		______ Johanna	Mother	F	W	64	Wd		2	1	Ger-Ger	Ger-Ger	Ger-Ger	1852		None			Y	Y	Y

7.  1920 Census Index/Images (online at Ancestry.com, Image #2 of 22):  Auburn Twp., Fond du Lac Co., WI, Roll T625_1987 (Book 1), p. 35B, PN 1B, SD 5, ED 22, enumerated 3 Jan 1920, official enumeration date 1 Jan 1920 (extracted by Diana Gale Matthiesen):¤•

1920:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).
2	3	4	5	6	7	8	9	10	11	12	13	14	17	18	19	20	21	22	23	24	25	26	27	28	29
Fm	15	16	Straub George	Head	O	M	M	W	40	M			Y	Y	Wisconsin		Ohio		Hohenzollern Ger	German	Y	Farmer	General Farm	W	15
			[George's wife and children]
			______ Johanna	Mother			F	W	74	W	Un	Un	Y	Y	Hohenzollern Ger	German	Hohenzollern Ger	German	Hohenzollern Ger	German	Y	None

8.  1930 Census Every-Name-Index/Images (online at Ancestry.com):  not found.

9.  Descendant Chart of Johann STRAUB (1704-1772) by Rolf Schorp (13 May 2005).

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