I have dual citizenship. I'm living in the U.S. I also have a bank account in France. I would like to transfer money from my French bank account to my U.S. bank account (over $100000) for a deposit on a house property that I want to purchase. Do I, or do the bank have to report this transaction to the I.R.S. or treasury ? Am I taxable ?
Thank you in advance for your help ! I much appreciate your expertise...

No, it is not taxable. You do not need to report this transcation to IRS. Hope you are filing Form TD F 90-22.1 and reporting any interest income on your U.S. tax return.

The OP may also have to file Form 3520 to report details about the $100K. Information return only; no taxes due.