* Within Kansas: You'll likely find more robust art and design programs that offer *some* fashion design coursework, but a full-fledged major in fashion design might be rare. Look into the art departments of larger universities like Kansas State University (Manhattan), the University of Kansas (Lawrence), and Wichita State University (Wichita). Check their course catalogs carefully to see if they offer relevant classes in apparel design, textile design, or related areas.
* Nearby States (Considerable Travel): For a more focused fashion design education, you'll probably need to look to neighboring states. Colleges in Missouri, Oklahoma, Colorado, or even Texas might have more comprehensive fashion design programs. Research schools in those states to find the best fit for your needs. This will involve more travel, but the education may be worth it if a strong fashion design program is your priority.
Recommendation: I strongly suggest visiting the websites of the art and design departments at the Kansas universities mentioned above, and also researching universities in surrounding states, using keywords like "fashion design," "apparel design," "textile design," and "costume design" in your searches. Pay close attention to the course descriptions to see how much emphasis is placed on fashion design within the broader program.