The Colby/Thomas County Chamber of Commerce, Colby Convention & Visitors Bureau and Thomas County Economic Development Alliance welcome you to our website. Colby is truly a charming community located on I-70 at Exits 53 & 54 in Northwest Kansas and is the county seat of Thomas County. We consider Thomas County--the “OASIS ON THE PLAINS”...a vital progressive community in Northwest Kansas. We are proud of our educational, commercial, medical, cultural, shopping and hospitality facilities. We value our “quality of life” and are pleased to share it with you. We are most proud of our warm, friendly people who heartily welcome you. Thomas County is truly an ideal place to live, work, shop and visit.