ZIP Codes Starting with 3
3,402 ZIP codes across 91 three-digit prefixes, 47.3M residents tracked.
Prefixes 91
300xx
61 ZIPs
2.5M pop
301xx
56 ZIPs
1.3M pop
302xx
55 ZIPs
1.1M pop
303xx
39 ZIPs
1.0M pop
304xx
42 ZIPs
229K pop
305xx
63 ZIPs
728K pop
306xx
44 ZIPs
428K pop
307xx
31 ZIPs
373K pop
308xx
21 ZIPs
224K pop
309xx
6 ZIPs
203K pop
310xx
81 ZIPs
546K pop
312xx
9 ZIPs
166K pop
313xx
24 ZIPs
242K pop
314xx
12 ZIPs
261K pop
315xx
44 ZIPs
344K pop
316xx
31 ZIPs
199K pop
317xx
51 ZIPs
363K pop
318xx
26 ZIPs
88K pop
319xx
7 ZIPs
199K pop
320xx
46 ZIPs
711K pop
321xx
44 ZIPs
657K pop
322xx
35 ZIPs
1.1M pop
323xx
41 ZIPs
443K pop
324xx
42 ZIPs
367K pop
325xx
40 ZIPs
734K pop
326xx
43 ZIPs
393K pop
327xx
41 ZIPs
1.1M pop
328xx
33 ZIPs
1.1M pop
329xx
33 ZIPs
701K pop
330xx
49 ZIPs
1.8M pop
331xx
62 ZIPs
2.0M pop
333xx
27 ZIPs
847K pop
334xx
57 ZIPs
1.6M pop
335xx
43 ZIPs
904K pop
336xx
27 ZIPs
824K pop
337xx
39 ZIPs
765K pop
338xx
51 ZIPs
838K pop
339xx
49 ZIPs
908K pop
341xx
23 ZIPs
441K pop
342xx
48 ZIPs
897K pop
344xx
32 ZIPs
493K pop
346xx
33 ZIPs
731K pop
347xx
32 ZIPs
861K pop
349xx
22 ZIPs
509K pop
350xx
56 ZIPs
472K pop
351xx
39 ZIPs
344K pop
352xx
31 ZIPs
505K pop
354xx
33 ZIPs
258K pop
355xx
41 ZIPs
152K pop
356xx
36 ZIPs
391K pop
357xx
32 ZIPs
271K pop
358xx
11 ZIPs
212K pop
359xx
38 ZIPs
287K pop
360xx
56 ZIPs
300K pop
361xx
14 ZIPs
208K pop
362xx
28 ZIPs
184K pop
363xx
34 ZIPs
246K pop
364xx
31 ZIPs
102K pop
365xx
58 ZIPs
412K pop
366xx
20 ZIPs
279K pop
367xx
41 ZIPs
100K pop
368xx
26 ZIPs
286K pop
369xx
13 ZIPs
17K pop
370xx
64 ZIPs
1.1M pop
371xx
47 ZIPs
766K pop
372xx
21 ZIPs
475K pop
373xx
76 ZIPs
612K pop
374xx
15 ZIPs
211K pop
376xx
33 ZIPs
422K pop
377xx
47 ZIPs
359K pop
378xx
57 ZIPs
550K pop
379xx
18 ZIPs
437K pop
380xx
48 ZIPs
429K pop
381xx
29 ZIPs
722K pop
382xx
27 ZIPs
113K pop
383xx
60 ZIPs
290K pop
384xx
34 ZIPs
192K pop
385xx
44 ZIPs
248K pop
386xx
53 ZIPs
425K pop
387xx
39 ZIPs
104K pop
388xx
41 ZIPs
259K pop
389xx
36 ZIPs
103K pop
390xx
35 ZIPs
283K pop
391xx
41 ZIPs
284K pop
392xx
16 ZIPs
218K pop
393xx
39 ZIPs
197K pop
394xx
36 ZIPs
378K pop
395xx
27 ZIPs
412K pop
396xx
26 ZIPs
128K pop
397xx
29 ZIPs
167K pop
398xx
31 ZIPs
107K pop
Data from the Census Bureau American Community Survey (2022 5-year estimates) by ZIP Code Tabulation Area (ZCTA). Geographic boundaries from the U.S. Census Bureau TIGER/Line shapefiles.