[8] According to the United States Census Bureau, the city has a total area of 0.39 square miles (1.01 km2), all land.

[9] Neck City is part of the Joplin, Missouri Metropolitan Statistical Area.

The racial makeup of the city was 93.5% White, 2.2% Native American, and 4.3% from two or more races.

25.0% of all households were made up of individuals, and 14.7% had someone living alone who was 65 years of age or older.

The racial makeup of the city was 96.64% White, 0.84% Native American, and 2.52% from two or more races.

28.6% of all households were made up of individuals, and 12.2% had someone living alone who was 65 years of age or older.

There were no families and 3.4% of the population living below the poverty line, including no under eighteens and none of those over 64.