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/TN/HIGHEST-DENSITY

Most Densely Populated ZIP Codes in Tennessee

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 38505 Cookeville Putnam 19,200
2 37315 Collegedale Hamilton 14,370
3 37219 Nashville Davidson 11,102
4 37916 Knoxville Knox 11,060
5 37212 Nashville Davidson 7,488
6 37682 Milligan College Carter 5,794
7 38550 Campaign Warren 5,667
8 37614 Johnson City Washington 5,613
9 38103 Memphis Shelby 5,489
10 37902 Knoxville Knox 5,457
11 37203 Nashville Davidson 5,113
12 38104 Memphis Shelby 4,571
13 37201 Nashville Davidson 4,570
14 38115 Memphis Shelby 4,485
15 38152 Memphis Shelby 4,424
16 37132 Murfreesboro Rutherford 4,383
17 37208 Nashville Davidson 4,337
18 38111 Memphis Shelby 4,290
19 38122 Memphis Shelby 3,817
20 37403 Chattanooga Hamilton 3,761
21 37206 Nashville Davidson 3,683
22 37211 Nashville Davidson 3,525
23 38112 Memphis Shelby 3,498
24 38105 Memphis Shelby 3,275
25 38126 Memphis Shelby 3,200
26 37915 Knoxville Knox 3,162
27 37402 Chattanooga Hamilton 3,074
28 38141 Memphis Shelby 3,068
29 37404 Chattanooga Hamilton 2,844
30 37216 Nashville Davidson 2,828
31 38117 Memphis Shelby 2,745
32 37923 Knoxville Knox 2,717
33 37407 Chattanooga Hamilton 2,693
34 37013 Antioch Davidson 2,683
35 38114 Memphis Shelby 2,672
36 38119 Memphis Shelby 2,661
37 37917 Knoxville Knox 2,591
38 37411 Chattanooga Hamilton 2,588
39 38107 Memphis Shelby 2,553
40 37412 Chattanooga Hamilton 2,525
41 37909 Knoxville Knox 2,466
42 38016 Cordova Shelby 2,437
43 38134 Memphis Shelby 2,366
44 37383 Sewanee Franklin 2,356
45 38135 Memphis Shelby 2,353
46 38108 Memphis Shelby 2,312
47 38125 Memphis Shelby 2,266
48 37204 Nashville Davidson 2,258
49 37207 Nashville Davidson 2,138
50 38138 Germantown Shelby 2,122

Showing the top 50 of 636 ZIP codes in Tennessee that have this figure . 38505 ranks 1st at 19,200, against 2,122 in 50th place.

Other rankings for Tennessee

Cite this page

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

Underlying data is public domain or openly licensed — sources, vintages and licences.