It's unclear how accurate the data is, but this site attempts to list a table of civilian casualties. Sources are cited, and the table indicates both minimum and maximum reported numbers.

What's still unclear is how to define civilian vs. military casualties. I'm also interested in this dataset for the number of Iraqi soldiers who were killed, but have not seen any such collection (and the Iraqi government never released those numbers either).

In any case, verifiable or not, at least this site does attempt to collect *some* of the data . . .

Iraq Body Count Database