IRS in Great Falls

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Contact details from the official IRS Local Office Locator (apps.irs.gov).

219 2nd Ave South, 3rd FloorGreat Falls MT 59405

844-545-5640

Mon–Fri	8:30 a.m.–4:30 p.m.

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Full guide for Great Falls

Contact details from the official IRS Local Office Locator (apps.irs.gov).

219 2nd Ave South, 3rd FloorGreat Falls MT 59405

844-545-5640

Mon–Fri	8:30 a.m.–4:30 p.m.

Book appointment Official website Online service Details

Content last checked: 8/11/2026 · Great Falls offices