There shall be the following three classes of municipal corporations:

(1) Municipalities of the first class are municipal corporations with a population of five thousand and over;

(2) Municipalities of the second class are municipal corporations with a population between five hundred and five thousand;

(3) Municipalities of the third class are municipal corporations with a population of less than five hundred.

Source: SL 1899, ch 61, § 1; RPolC 1903, § 1179; RC 1919, §§ 6164 to 6167; SDC 1939, § 45.0102; SL 1992, ch 60, § 1.