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

John L CUPP Spouse: Kate H BLACK Marriage: 7 Jun 1857, Preble, Ohio Source: Preble County, Ohio, Marriages, 1808-1859 (D.A.R., Washington, DC)

2.  1860 Census Images (online at Ancestry.com; Image #9 of 44):  West Alexandria P.O., Lanier Twp., Preble Co., OH, p. 141A, PN 89, 760/740, enumerated 12 Jul 1860 (extracted by Diana Gale Matthiesen):

John L Cupp	34	M		Cooper	1800	800	Va
Catharine	27	F					Ohio
Neuesky	2	M					"

3.  1870 Census Images (online at Ancestry.com; Image #18-19 of 42):  South ½ of the Village of West Alexandria, Lanier Twp., Preble Co., OH, pp. 158B-159A, PN 18-19, 136/130, enumerated 13 Aug 1870 (extracted by Diana Gale Matthiesen).  This image is very pale and difficult to read; I may have made mistakes.

Cupp John L	46	M	W	Jour Cooper	1400	400	Virginia
____ Kate	36	F	W	Keeping House			Ohio
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Cupp Ira? a?	8	F	W	Attending School			Ohio
____ Albertis?	7	M	W	Attending School			Ohio
____ Hurbort?	4	M	W				Ohio

The second letter in "Ira's" name is definitely "r," not "n."  There are several BLACK families in the area.

4a.  Ohio Genealogical Society.  1991.  Index to the 1880 Federal Population Census for the State of Ohio (Broderbund  CD-20):

1880

Cupp, Kate H.

OH

Preble Co.

Lanier Twp.

p. 150C

4b.  1880 United States Census and National Index (LDS Family History Resource File: CD-ROM Library):

Census Place: West Alexandria, Preble, Ohio
Source: FHL Film 1255060; NARA Film T9-1060; Pg 150C
	Relation	Sex	Marr	Race	Age	Birthplace	Occupation	Fa	Mo
Kate H. CRIPP	Wife	F	W	W	47	OH	...	VA	OH
Ina N. CRIPP	Dau	F	S	W	18	OH		VA	OH
Bent C. C. CRIPP	Son	M	S	W	16	OH		VA	OH
Herbert CRIPP	Son	M	S	W	14	OH		VA	OH

4c.  1880 Census Images (online at Ancestry.com; Image #35 of 43):  West Alexandria, Preble Co., OH, p. 150C, PN 33, SD 2, ED 200, enumerated 19-21 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).
3	4	5	6	8	9	11	13	21	24	25	26
Kate H. Cupp	W	F	47	Wife		/	Seamstress		OH	VA	OH
Ina/Ira N. "	W	F	18	Daught	/			/	OH	VA	OH
Bert C C   "	W	M	16	Son	/			/	OH	VA	OH
Herbert    "	W	M	14	Son	/			/	OH	VA	OH

This enumerator recorded no dwelling or visitation numbers.  Also, his handwriting was appalling.  His "n's" and "r's" were essentially indistinguishable.  "C C" could be "Cole."