Climax is a city in Greenwood County, Kansas, United States.

[7] According to the United States Census Bureau, the city has a total area of 0.12 square miles (0.31 km2), all of it land.

[8] The 2020 United States census counted 45 people, 21 households, and 16 families in Climax.

23.8% of households consisted of individuals and 14.3% had someone living alone who was 65 years of age or older.

[10] The 2016-2020 5-year American Community Survey estimates show that the median family income was $68,750 (+/- $28,043).

14.3% of all households were made up of individuals, and 10.7% had someone living alone who was 65 years of age or older.

25.0% of all households were made up of individuals, and 8.3% had someone living alone who was 65 years of age or older.

There were no families and 4.1% of the population living below the poverty line, including no under eighteens and 22.2% of those over 64.

The community is served by Eureka USD 389 public school district.