100 Largest ZIP Codes in the United States by Population in St. Louis County, Missouri

Explore the 100 largest ZIP codes in the United States ranked by population using U.S. Census demographic data. This page lists ZIP codes located in St. Louis County, Missouri.

Rank	ZIP Code	City	State	Population
1	63021	BALLWIN	MO	55,944
2	63129	SAINT LOUIS	MO	51,893
3	63031	FLORISSANT	MO	50,568
4	63123	SAINT LOUIS	MO	50,347
5	63026	FENTON	MO	44,824
6	63017	CHESTERFIELD	MO	42,686
7	63136	SAINT LOUIS	MO	42,385
8	63122	SAINT LOUIS	MO	41,416
9	63033	FLORISSANT	MO	41,037
10	63011	BALLWIN	MO	36,515
11	63119	SAINT LOUIS	MO	34,732
12	63114	SAINT LOUIS	MO	34,341
13	63125	SAINT LOUIS	MO	32,750
14	63146	SAINT LOUIS	MO	31,348
15	63128	SAINT LOUIS	MO	30,168
16	63130	SAINT LOUIS	MO	28,978
17	63121	SAINT LOUIS	MO	24,126
18	63043	MARYLAND HEIGHTS	MO	22,123
19	63141	SAINT LOUIS	MO	20,781
20	63137	SAINT LOUIS	MO	20,390
21	63135	SAINT LOUIS	MO	19,764
22	63005	CHESTERFIELD	MO	19,734
23	63034	FLORISSANT	MO	19,031
24	63105	SAINT LOUIS	MO	19,003
25	63138	SAINT LOUIS	MO	18,602
26	63131	SAINT LOUIS	MO	18,531
27	63042	HAZELWOOD	MO	18,143
28	63025	EUREKA	MO	17,708
29	63074	SAINT ANN	MO	15,888
30	63126	SAINT LOUIS	MO	15,201
31	63134	SAINT LOUIS	MO	14,023
32	63132	SAINT LOUIS	MO	13,995
33	63124	SAINT LOUIS	MO	10,997
34	63044	BRIDGETON	MO	10,821
35	63117	SAINT LOUIS	MO	9,691
36	63143	SAINT LOUIS	MO	9,097
37	63144	SAINT LOUIS	MO	9,027
38	63040	WILDWOOD	MO	8,662
39	63088	VALLEY PARK	MO	8,473
40	63038	WILDWOOD	MO	7,153
41	63133	SAINT LOUIS	MO	6,763
42	63127	SAINT LOUIS	MO	5,235
43	63140	SAINT LOUIS	MO	291