According to the United States Census Bureau, the city has a total area of 0.37 square miles (0.96 km2), all land.

25.8% of all households were made up of individuals, and 15.3% had someone living alone who was 65 years of age or older.

31.4% of all households were made up of individuals, and 11.4% had someone living alone who was 65 years of age or older.

None of the families and 1.7% of the population were living below the poverty line, including no under eighteens and 3.5% of those over 64.

Platte Woods is a fourth class city under Missouri statutes.

[7] Its governing body consists of the Mayor and a four-member Board of Aldermen that cover two wards.

The Municipal Court Judge and Prosecutor serve on a contract basis.