Where is Ontario?

Ontario - Caldwell Ontario - Huntington Ontario - Seattle/Tacoma Ontario - Adrian Ontario - Boise Ontario - Meridian Ontario - Richland Ontario - Yellowstone Lake Ontario - Seattle Art Museum Ontario - Parma Ontario - Cambridge Ontario - Albany Ontario - Baker City Ontario - Bend Ontario - Boise Airport Ontario - Burley Ontario - Burns Ontario - Carleton-sur-Mer Ontario - Coos Bay Ontario - Corvallis Ontario - Eagle Pass Ontario - Eugene Ontario - Glenns Ferry Ontario - Flagstaff Ontario - Grand Junction Ontario - Gold Beach Ontario - Grangeville Ontario - Grants Pass Ontario - Hermiston Ontario - Hood River Ontario - John Day Fossil Beds National Monument Ontario - Idaho Falls Ontario - John Day Ontario - Joseph Ontario - La Grande Ontario - Las Vegas Ontario - Lewiston Ontario - Lincoln City Ontario - Medford Ontario - Missoula Ontario - Mount Rushmore Ontario - Mountain Home Ontario - Newport Ontario - North Dakota Ontario - Nyssa Ontario - Oregon Coast Ontario - Payette Ontario - Pendleton Ontario - Pocatello Ontario - Prineville Ontario - Portland Ontario - Redmond Ontario - Redding Ontario - Reno Ontario - Riggins Ontario - Roseburg Ontario - Salem Ontario - Salt Lake City Ontario - Seattle Ontario - Sisters Ontario - Spokane Ontario - Tacoma Ontario - Troutdale Ontario - Vale Ontario - Twin Falls Ontario - Walla Walla Ontario - Winnemucca Ontario - Yellowstone National Park