Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — RANKINGS/SC/HIGHEST-DENSITY

Most Densely Populated ZIP Codes in South Carolina

What this measures. People per square mile of land area. Source: Census American Community Survey and Gazetteer, data release 2026-10-12.

# ZIP City County People per sq mi
1 29424 Charleston Charleston 32,711
2 29208 Columbia Richland 17,847
3 29225 Columbia Richland 16,407
4 29409 Charleston Charleston 14,082
5 29733 Rock Hill York 11,469
6 29614 Greenville Greenville 9,726
7 29401 Charleston Charleston 6,084
8 29117 Orangeburg Orangeburg 6,071
9 29634 Clemson Pickens 4,336
10 29403 Charleston Charleston 4,174
11 29613 Greenville Greenville 3,739
12 29205 Columbia Richland 3,442
13 29601 Greenville Greenville 3,247
14 29204 Columbia Richland 2,853
15 29229 Columbia Richland 2,840
16 29662 Mauldin Greenville 2,713
17 29378 Una Spartanburg 2,510
18 29420 North Charleston Dorchester 2,392
19 29407 Charleston Charleston 2,389
20 29210 Columbia Richland 2,384
21 29650 Greer Greenville 2,364
22 29708 Fort Mill York 2,295
23 29206 Columbia Richland 2,288
24 29456 Ladson Charleston 2,281
25 29201 Columbia Richland 2,134
26 29223 Columbia Richland 2,095
27 29406 Charleston Charleston 2,089
28 29410 Hanahan Berkeley 2,043
29 29575 Myrtle Beach Horry 2,029
30 29615 Greenville Greenville 2,019
31 29418 North Charleston Charleston 1,969
32 29631 Clemson Pickens 1,934
33 29899 Mc Cormick McCormick 1,883
34 29169 West Columbia Lexington 1,863
35 29816 Bath Aiken 1,829
36 29683 Slater Greenville 1,803
37 29405 North Charleston Charleston 1,793
38 29464 Mount Pleasant Charleston 1,761
39 29834 Langley Aiken 1,660
40 29605 Greenville Greenville 1,640
41 29607 Greenville Greenville 1,593
42 29681 Simpsonville Greenville 1,571
43 29577 Myrtle Beach Horry 1,560
44 29466 Mount Pleasant Charleston 1,540
45 29316 Boiling Springs Spartanburg 1,517
46 29935 Port Royal Beaufort 1,506
47 29375 Reidville Spartanburg 1,439
48 29665 Newry Oconee 1,397
49 29572 Myrtle Beach Horry 1,369
50 29611 Greenville Greenville 1,352

Showing the top 50 of 424 ZIP codes in South Carolina that have this figure . 29424 ranks 1st at 32,711, against 1,352 in 50th place.

Other rankings for South Carolina

Cite this page

zipcodes.pro. “Most Densely Populated ZIP Codes in South Carolina.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/sc/highest-density

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