Webestimates of taxable property are up 14. 98% in unincorporated osceola county ($45. 58 billion), 14. 8% in kissimmee ($5. 59 billion), up 19. 79% in st. Webosceola county, florida, has witnessed a remarkable increase in median home values, climbing from $132,100 in 2015 to $285,200 in 2022, outpacing national trends and. Webthe average home value in osceola county, fl is $382,569, up 2. 0% over the past year. Learn more about the osceola county housing market and real estate trends. Webthe osceola county association of realtors® tracks home sales in osceola county each week with data provided by stellar mls. The market reports are.