The 21-year-old Austrian had a trial with the Staggies in their friendly against Dutch side NEC Nijmegen on Saturday before he finalised his loan switch to on Tuesday.
Bachmann will compete with Staggies number one Scott Fox for a starting berth under Jim McIntyre.
County will begin their league campaign on Saturday away to reigning champions Celtic.
Daniel Bachmann's 6-month loan switch to Ross County has now been completed - http://t.co/TtzylPP8fK#scfcpic.twitter.com/y0YQGTZ7vS
— Stoke City FC (@stokecity) July 28, 2015
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