Here's one easy ways (assuming you have a column heading):
Use a Pivot Table
Set ROW to your_col_heading
Set DATA to Count of your_col_heading
Does that help?
***********
Regards,
Ron
XL2002, WinXP-Pro
> I need to count and display unique values
>
[quoted text clipped - 11 lines]
>
> Thnaks
Cell B1: =A1
Cell B2: =IF(ISERROR(MATCH(0,COUNTIF(B$1:B1,$A$1:$A$20&""),0)),"",
INDEX(IF(ISBLANK($A$1:$A$20),"",$A$1:$A$20),MATCH(0,COUNTIF(B$1:B1,$A$1:$A$2
0&""),0)))
enter as an array formula, commit with Ctrl-Shift-Enter, then copy down
Cell C1: =IF(B1<>"",COUNTIF(A:A,B1),"")
and copy down

Signature
HTH
RP
(remove nothere from the email address if mailing direct)
> I need to count and display unique values
>
[quoted text clipped - 11 lines]
>
> Thnaks