1850 Census
Ferguson     James           37  VA      IN      Clinton; Jackson
Furguson     Martha E        14  IA      IN      Clinton; Jackson
Furguson     Nancy J         15  IA      IN      Clinton; Jackson
Fergerson    Jemma           24  OH      IN      Clinton; Jefferson
Fergerson    John S          29  OH      IN      Clinton; Jefferson
Ferguson     Charles         7   IA      IN      Clinton; Kirklin
Ferguson     Eliza J         10  IA      IN      Clinton; Kirklin
Ferguson     Elizabeth       14  IA      IN      Clinton; Kirklin
Ferguson     Hester          18  IA      IN      Clinton; Kirklin
Ferguson     Jackson         22  OH      IN      Clinton; Kirklin
Ferguson     James C         3   IA      IN      Clinton; Kirklin
Ferguson     Jesse           12  IA      IN      Clinton; Kirklin
Ferguson     John            46  VA      IN      Clinton; Kirklin
Ferguson     Mary A          5   IA      IN      Clinton; Kirklin
Ferguson     Nancy           20  IA      IN      Clinton; Kirklin
Ferguson     Winney          42  VA      IN      Clinton; Kirklin
Ferguson     Winney d        1   IA      IN      Clinton; Kirklin
1860 Census
Furgeson     John            56  Male    Ky     IN      Clinton Kirklin Twp
Furgeson     Amanda          18  Female  Va     IN      Clinton Michigan Twp
Furgeson     Jackson         32  Male    Oh     IN      Clinton Sugar Crk Twp
1870 Census
Furgurson    Margart         53  Female  Scot   IN      Clinton Jackson twp
Furgusson    Charles         26  Male    In     IN      Clinton Kirklin Twp
Furguson     Henry           48  Male    Ky     IN      Clinton Kirklin Twp
Furgusson    J               66  Male    Va     IN      Clinton Kirklin Twp
Furgurson    Jackson         42  Male    Oh     IN      Clinton Sugar Crk Twp
Fergurson    Walter P        29  Male    In     IN      Clinton Sugar Crk Twp
1900 Census
Furgurson       Edward           36  Male    Oh      IN      Clinton 2-Wd Frankfort
Ferguson        John M           59  Male    In      IN      Clinton Jackson Twp
Ferguson        Abraham          38  Male    In      IN      Clinton Kirklin Twp
Ferguson        Charles R        34  Male    In      IN      Clinton Kirklin Twp
Ferguson        Isaac            35  Male    In      IN      Clinton Kirklin Twp
Ferguson        Jacob            32  Male    In      IN      Clinton Kirklin Twp
Farguson        Jesse            16  Female  In      IN      Clinton Kirklin Twp
Ferguson        Johnson          40  Male    In      IN      Clinton Kirklin Twp
Ferguson        Milton           28  Male    In      IN      Clinton Kirklin Twp
Ferguson        Samuel           22  Male    In      IN      Clinton Kirklin Twp
Fergison        George           43  Male    In      IN      Clinton Sugar Crk Twp
1910 Census
Ferguson        Charles          19  Male    Mo      IN      Clinton 1-Wd Kirklin
Ferguson        William          24  Male    In      IN      Clinton 1-Wd Kirklin
Ferguson        Abraham          47  Male    In      IN      Clinton Kirklin Twp
Ferguson        Charles          45  Male    In      IN      Clinton Kirklin Twp
Ferguson        Issac            44  Male    In      IN      Clinton Kirklin Twp
Ferguson        James P          76  Male    In      IN      Clinton Kirklin Twp
Ferguson        Samuel H         31  Male    In      IN      Clinton Kirklin Twp
Ferguson        George           51  Male    In      IN      Clinton Sugar Crk Twp
Ferguson        John             5   Male    In      IN      Clinton Sugar Crk Twp
Ferguson        Peter            38  Male    In      IN      Clinton Sugar Crk Twp
1920 Census
Ferguson        Grace            17  Female  Ky      IN      Clinton 1-Wd; Frankfort; Center Twp
Ferguson        James R          26  Male    In      IN      Clinton 2-Wd; Colfax; Perry Twp
Ferguson        George           19  Male    Yugo    IN      Clinton 3-Wd; Frankfort; Center Twp
Ferguson        Varie            32  Male    Ky      IN      Clinton 3-Wd; Frankfort; Center Twp
Fergueson       Aberhan          57  Male    In      IN      Clinton Kirklin; Kirklin Twp
Fergueson       Effie M          49  Female  In      IN      Clinton Kirklin; Kirklin Twp
Ferguson        Charles M        29  Male    In      IN      Clinton Kirklin; Kirklin Twp
Ferguson        Charles R        59  Male    In      IN      Clinton Kirklin; Kirklin Twp
Ferguson        Isac             54  Male    In      IN      Clinton Kirklin; Kirklin Twp
Ferguson        John A           67  Male    In      IN      Clinton Kirklin; Kirklin Twp
Ferguson        Karl             26  Male    In      IN      Clinton Kirklin; Kirklin Twp
Ferguson        Mare             12  Female  In      IN      Clinton Kirklin; Kirklin Twp
Ferguson        Paul             25  Male    In      IN      Clinton Kirklin; Kirklin Twp
Ferguson        William H        34  Male    In      IN      Clinton Kirklin; Kirklin Twp
Ferguson        Garth            8   Male    In      IN      Clinton Sugar Crk Twp
Ferguson        George           64  Male    In      IN      Clinton Sugar Crk Twp
Ferguson        Milford          46  Male    In      IN      Clinton Sugar Crk Twp

The 1830 Census was copied from two sources; Accelerated Indexing Systems International, Inc and the INDIANA Historical Society.  Many spellings of the FERGUSON surname and different numbers, one may be the page number of  the census and one may be the household number.  As this is an index, the original census should be consulted.

IN 1830-Clinton Co
FURGASON            ATHOL                       CLIN              69
FORGASON            JOHN                        CLIN              55
FERGUSON            JOHN                        CLIN              108
FURGURSON           THOMAS                      CLIN              64
FURGASON            WILLIAM                     CLIN              65

IN - 1840 Census - Clinton Co
Information from the IN Historical Society
FERGUSON            John           Clin                728

IN 1850 CENSUS - CLINTON
SOURCE:ACCELERATED INDEXING SYSTEMS INTERNATIONAL, INC.
FERGUSON            JAMES          CLIN         440
FERGUSON            JOHN           CLIN         418
FERGUSON            JOHN S         CLIN         341
FURGUSON            NANCY G        CLIN         456