Inflation appears to be under control, but if pressures surge, "I would aggressively advocate" for interest-rate hikes, he told Dallas's Rotary Club of the Park Cities.
The Fed has kept benchmark interest rates at 5.25 percent since June.
Fisher is not a voting member of the monetary policy-setting Federal Open Market Committee this year.
Fisher said he was confident the Fed would bring core inflation back down below 2 percent. Core inflation is currently slightly above 2 percent, Fisher said.