— born in either Greene Co., IL, or Macoupin Co., IL:
2.  Mary E. COOPER, b. 1841/2
3.  Nancy A. COOPER, b. 1843/4
4.  Phyluria / Phylura / Filura / Phyllura COOPER, b. 1848/9

— born in Macoupin Co., IL:
5.  Samuel COOPER, b. 1851/2

1.  Illinois Statewide Marriage Index, 1763–1900 (online at the Illinois State Archives web site):

COOPER, James

CARRICO, Mary

08/16/1836

v. 1, p. 34

Lic #34

Greene Co.

2.  1840 Census Index/Images (online at Ancestry.com, Image #3-4 of 24; extracted by Diana Gale Matthiesen):

1840

IL

Greene Co.

Carrollton Twp.

Roll 60

pp. 77B-78A

Ln. 20

James Cooper

110 010 - 012 001

0100000

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	4 or under	1835-1840	= Thomas COOPER (b. 1836/7)
1 male	5-9	1830-1835	= Nathaniel CARRICO (b. 1833)
1 male	20-29	1810-1820	= James COOPER (b. 1810/1)
1 female	5-9	1830-1835	= Hannah CARRICO (b. 1830/1)
2 females	10-14	1825-1830	= Elizabeth CARRICO (b. 1829/30) = Sarah Jane CARRICO (b. 1827)
1 female	30-39	1800-1810	= Mary (BROWN) CARRICO COOPER (b. 1810)
1	person employed in agriculture

3.  1850 Census Every-Name-Index/Images (online at Ancestry.com, Image #19-20 of 76):  Macoupin Co., IL, Roll M432_118, p. 191B-192A, 7/7 [this enumerator re-started the visitation numbers on each new page], enumerated 24 Aug 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):

James Cooper	39	M		Farmer	435	Ky
Mary Cooper	40	F				Mo
Hannah Cooper	19	F				Ills
[next page]
Nathaniel Cooper	16	M		Farmer		Ills
Thos J Cooper	13	M				Ills
Mary E Cooper	8	F				Ills
Nancy A Cooper	6	F				Ills
P. Cooper	1	F				Ills

Hannah and Nathaniel are Mary's children from her prior marriage.

4.  1860 Census Every-Name-Index/Images (online at Ancestry.com, Image #5 of 22):  Shaws Point P.O., T10_.R6_, Macoupin Co., IL, Roll M653_206, p. 555, PN 25, 180/176, enumerated 20 Sep 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):

James Cooper	46	M		Farmer	2000	400	Ky
Mary     "	51	F					Mo
Mary     "	19	F					Ill
Nancy    "	16	F					"
Phyluria "	12	F					"
Samuel   "	8	M					"
Thomas Smith	31	M		Farmer		400	England
Orpha    "	24	F					Ill

5.  1870 Census Every-Name-Index/Images (online at Ancestry.com, Image # 29 of 42):  Bear Creek P.O., Bear Creek Twp., Montgomery Co., IL, Roll M593_262, p. 31A, PN 29, 227/222, enumerated 4 Jun 1870, official enumeration date 1 Jun 1870 (extracted by Diana Gale Matthiesen):

Cooper James	64	M	W	Farmer	1000	200	Kentucky
______ Mary	60	F	W	Keeping house			Missouri
______ Filura	20	F	W				Illinois
______ Samuel	18	M	W				Illinois

6.  1880 Census Every-Name-Index/Images (online at Ancestry.com, Image #5 of 23):  Honey Point Twp., Macoupin Co., IL, Roll T9_232, p. 218A, PN 5, SD 6, ED 118, enumerated 4 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).
2	3	4	5	6	8	11	13	24	25	26
26	Carico Nathaniel	W	M	46			Farmer	Ill	Ky	Mo
	[Nathaniel's children, plus two boarders]
	Cooper Mary	W	F	70	Mother	/		Mo	Wales	SC

7.  1890 Census:  the 1890 Census Population Schedules were destroyed. 

8.  1900 Census Every-Name-Index/Images (online at Ancestry.com):  not found.