Is there someway I can return this in a single query as a single dataset?

Select count(ColumnA),ColumnB,ColumnC
From TableA A
Where dateA > '01/01/2012'

UNION ALL

Select count(ColumnA),ColumnB,ColumnC    
From TableA  B

The count column in each query needs to remain as separate count columns.  Of course the difference being is one has the date filter the other does not.

Modifying your query:

Select count(ColumnA),ColumnB,ColumnC
From Table A
Where dateA > '01/01/2012'
GROUP BY ColumnB, ColumnC
Union
Select count(ColumnA),ColumnB,ColumnC    
From TableA
GROUP BY ColumnB, ColumnC

"The count column in each query needs to remain as separate count columns. "
What do you mean? Give example.

What I really need is this:

ColumnA1  ColumnA2   ColumnB    ColumnC

I need to maintain the two different count columns.  If I use UNION or UNION ALL - won't the counts just be merged?

Try this..
Let me know if this is what you're after.

Select count(ColumnA) As Table1Count,'' as Table2Count,ColumnB,ColumnC
From TableA A
Where dateA > '01/01/2012'

UNION ALL

Select '' as Table1Count, count(ColumnA) as Table2Count,ColumnB,ColumnC    
From TableA  B

ColumnA1&A2 are the same column with just the date filter difference.
I need ColumnA1 count based on the date filter
I need ColumnA2 count based on without date filter

ColumnA1   ColumnA2    
   500              10000

right,...try my last suggestion.
That should work.

Select count(ColumnA) as ColumnA1,ColumnA2=(SELECT Count(ColumnA) FROM TableA),ColumnB,ColumnC
From TableA A
Where dateA > '01/01/2012'

This will be a repeating column values, right?
List few records and the required output.

Select (Select count(ColumnA),ColumnB,ColumnC
From Table A Where dateA > '01/01/2012') As ColumnA ,
                   (Select count(ColumnA),ColumnB,ColumnC
From Table A) As ColumnA2,
                   ColumnB,ColumnC
From Table A

You are correct in that it gives the Total count for ColumnA2, but It doesn't breakout by name as in ColumnA1, see below:

ColumnB      ColumnA1        ColumnA2
Name1                 6                       540
Name2                 16                     540
Name3                 3                       540
Name4                 14                     540
Name5                  1                      540

So ColumnA2 doesn't appear to be using the main query portion for other things.

What is the raw data

ColumnA ColumnB
----               Name1
----                ----
To produce the above shown result?

Raw Data
ColumnB - Full Name
ColumnA1 - interaction dates  
ColumnA2 - interaction dates