BW wrote:
I need a formula that will sum the number of addresses listed in a cell. An
example of how they are entered is:

2550 Elm, 100 Main, 475 Maple, 702 Twin Oaks

There could be any number from 1 to 50 addresses in any given cell.
I'm using Excel 2003.

If it will suffice to count the number of commas plus 1 you can use this
formula:
=1+SUMPRODUCT(--(MID(A1,COLUMN(A:IV),1)=","))

Or this array* formula:
=1+SUM(IF(MID(A1,COLUMN(A:IV),1)=",",1))

*Commit the array formula by pressing Ctrl+Shift+Enter, do not just
press Enter or Tab.