Polo, Missouri City Location of Polo, Missouri Coordinates: 39°33′10″N 94°2′20″W﻿ / ﻿39.55278°N 94.03889°W﻿ / 39.55278; -94.03889Coordinates: 39°33′10″N 94°2′20″W﻿ / ﻿39.55278°N 94.03889°W﻿ / 39.55278; -94.03889 Country United States State Missouri County Caldwell Area[1] • Total 0.63 sq mi (1.63 km2) • Land 0.62 sq mi (1.61 km2) • Water 0.01 sq mi (0.03 km2) Elevation 1,014 ft (309 m) Population (2010)[2] • Total 575 • Estimate (2016)[3] 540 • Density 910/sq mi (350/km2) Time zone Central (CST) (UTC-6) • Summer (DST) CDT (UTC-5) ZIP code 64671 Area code(s) 660 FIPS code 29-58916[4] GNIS feature ID 0724721[5]