Clearmont is a city in northwestern Nodaway County, Missouri, United States. The population was 158 at the 2020 census. Clearmont was l…Clearmont is a city in northwestern Nodaway County, Missouri, United States. The population was 158 at the 2020 census. Clearmont was laid out in 1857. Originally styled Clairmont, some say the community was named after nearby Clear Creek, while others believe the name is a transfer from Clermont, Indiana. A post office called Clearmont has been in operation since 1881.