Yes. There are several locations in which you cannot carry a firearm, even with a concealed handgun license, including:

Any federal facility — federal courthouses, social security offices, BLM offices, secured areas of airports, airplanes.

Posted private property where the owner prohibits firearms possession, and others.

Many private businesses have conditions regarding the possession of firearms on their premises. If you violate these conditions you could, under certain circumstances, be subject to arrest under Oregon trespass laws, in which case, if convicted, your concealed handgun licensee would be seized and/or revoked.

National forests marked or posted with signs prohibiting all firearms.

Indian reservations or property — you may not carry a firearm concealed without the written permission of the tribal judge; this may also apply to certain casinos on tribal lands.

Courts or court buildings — in a courtroom, jury room, judge’s chambers, or adjacent areas that the presiding judge determines should be free of firearms to ensure the safety of litigants, court personnel witnesses, and others (This does NOT include municipal courts or municipal court buildings).

PLEASE NOTE: If you plan to carry your handgun, it is important to research the requirements at these locations before you go. Please see the Oregon Revised Statutes for any updated Oregon State restrictions. Please consult a licensed attorney before making any decisions. You may also contact the facility you plan to visit directly to obtain their policy.
You need to check with the Port Authority of each airport as other airports in Oregon are under other jurisdictions.