Browse top US counties

Los Angeles County, CA

295 ZIPs · 10,018,298 residents

Cook County, IL

167 ZIPs · 5,275,438 residents

Harris County, TX

132 ZIPs · 4,709,806 residents

Maricopa County, AZ

134 ZIPs · 4,306,182 residents

San Diego County, CA

115 ZIPs · 3,329,927 residents

Orange County, CA

88 ZIPs · 3,155,408 residents

Kings County, NY

38 ZIPs · 2,712,217 residents

Miami-Dade County, FL

80 ZIPs · 2,690,124 residents

Dallas County, TX

85 ZIPs · 2,685,596 residents

Riverside County, CA

71 ZIPs · 2,412,467 residents

Queens County, NY

66 ZIPs · 2,393,651 residents

King County, WA

86 ZIPs · 2,253,096 residents

Clark County, NV

76 ZIPs · 2,231,151 residents

San Bernardino County, CA

91 ZIPs · 2,162,321 residents

Bexar County, TX

70 ZIPs · 2,004,751 residents

Tarrant County, TX

65 ZIPs · 1,986,805 residents

Santa Clara County, CA

58 ZIPs · 1,957,143 residents

Broward County, FL

55 ZIPs · 1,934,551 residents

Wayne County, MI

69 ZIPs · 1,785,884 residents

Alameda County, CA

49 ZIPs · 1,690,090 residents

New York County, NY

69 ZIPs · 1,657,374 residents

Middlesex County, MA

81 ZIPs · 1,612,842 residents

Philadelphia County, PA

49 ZIPs · 1,597,423 residents

Sacramento County, CA

55 ZIPs · 1,573,469 residents

Suffolk County, NY

108 ZIPs · 1,550,149 residents

Hillsborough County, FL

55 ZIPs · 1,475,057 residents

Bronx County, NY

25 ZIPs · 1,473,354 residents

Palm Beach County, FL

50 ZIPs · 1,471,958 residents

Baltimore County, MD

67 ZIPs · 1,432,200 residents

Orange County, FL

45 ZIPs · 1,391,866 residents

Nassau County, NY

69 ZIPs · 1,370,784 residents

St. Louis County, MO

63 ZIPs · 1,328,588 residents

Travis County, TX

48 ZIPs · 1,323,030 residents

Franklin County, OH

44 ZIPs · 1,307,232 residents

Oakland County, MI

68 ZIPs · 1,299,332 residents

Hennepin County, MN

67 ZIPs · 1,279,562 residents

Cuyahoga County, OH

52 ZIPs · 1,269,177 residents

Allegheny County, PA

103 ZIPs · 1,224,948 residents

Salt Lake County, UT

42 ZIPs · 1,176,463 residents

Fairfax County, VA

43 ZIPs · 1,170,887 residents

Contra Costa County, CA

43 ZIPs · 1,167,833 residents

Fulton County, GA

38 ZIPs · 1,121,330 residents

Mecklenburg County, NC

34 ZIPs · 1,117,519 residents

Wake County, NC

32 ZIPs · 1,109,392 residents

Collin County, TX

29 ZIPs · 1,076,339 residents

Montgomery County, MD

48 ZIPs · 1,068,380 residents

Honolulu County, HI

38 ZIPs · 1,015,167 residents

Pima County, AZ

51 ZIPs · 1,012,729 residents

DuPage County, IL

37 ZIPs · 1,002,817 residents

Westchester County, NY

74 ZIPs · 998,242 residents

Duval County, FL

36 ZIPs · 982,695 residents

Fresno County, CA

55 ZIPs · 977,694 residents

Capitol County, CT

71 ZIPs · 976,241 residents

Marion County, IN

37 ZIPs · 970,597 residents

Pinellas County, FL

48 ZIPs · 957,989 residents

Bergen County, NJ

66 ZIPs · 952,979 residents

Erie County, NY

68 ZIPs · 950,297 residents

Prince George's County, MD

36 ZIPs · 948,492 residents

Milwaukee County, WI

36 ZIPs · 939,237 residents

Shelby County, TN

38 ZIPs · 934,247 residents

Pierce County, WA

57 ZIPs · 902,011 residents

Kern County, CA

47 ZIPs · 897,637 residents

Gwinnett County, GA

16 ZIPs · 880,632 residents

Macomb County, MI

36 ZIPs · 877,947 residents

Middlesex County, NJ

36 ZIPs · 868,728 residents

San Francisco County, CA

28 ZIPs · 865,933 residents

Hidalgo County, TX

29 ZIPs · 865,702 residents

El Paso County, TX

31 ZIPs · 860,851 residents

Worcester County, MA

85 ZIPs · 856,968 residents

Ventura County, CA

29 ZIPs · 856,890 residents

Essex County, NJ

31 ZIPs · 853,438 residents

Denton County, TX

27 ZIPs · 837,720 residents

Hamilton County, OH

54 ZIPs · 837,350 residents

Montgomery County, PA

58 ZIPs · 827,660 residents

DeKalb County, GA

29 ZIPs · 825,252 residents

Oklahoma County, OK

52 ZIPs · 820,384 residents

Snohomish County, WA

27 ZIPs · 816,611 residents

Essex County, MA

44 ZIPs · 804,564 residents

Multnomah County, OR

33 ZIPs · 802,767 residents

Suffolk County, MA

35 ZIPs · 787,964 residents

Jefferson County, KY

38 ZIPs · 787,247 residents

Fort Bend County, TX

21 ZIPs · 772,614 residents

Cobb County, GA

19 ZIPs · 767,599 residents

Monroe County, NY

44 ZIPs · 757,360 residents

San Joaquin County, CA

30 ZIPs · 745,964 residents

Norfolk County, MA

40 ZIPs · 734,865 residents

San Mateo County, CA

30 ZIPs · 732,609 residents

Lee County, FL

34 ZIPs · 724,234 residents

Davidson County, TN

30 ZIPs · 722,204 residents

El Paso County, CO

41 ZIPs · 718,582 residents

Jackson County, MO

56 ZIPs · 717,891 residents

Hudson County, NJ

16 ZIPs · 713,264 residents

Denver County, CO

31 ZIPs · 710,672 residents

Polk County, FL

40 ZIPs · 706,548 residents

Lake County, IL

28 ZIPs · 702,090 residents

Will County, IL

30 ZIPs · 693,059 residents

District of Columbia County, DC

57 ZIPs · 683,154 residents

Jefferson County, AL

54 ZIPs · 673,550 residents

Bernalillo County, NM

24 ZIPs · 671,224 residents

Tulsa County, OK

34 ZIPs · 666,585 residents

Providence County, RI

42 ZIPs · 657,373 residents

Kent County, MI

27 ZIPs · 650,681 residents

Utah County, UT

24 ZIPs · 644,690 residents

Bucks County, PA

48 ZIPs · 630,569 residents

Ocean County, NJ

29 ZIPs · 628,528 residents

Monmouth County, NJ

49 ZIPs · 626,355 residents

Western Connecticut County, CT

34 ZIPs · 619,472 residents

Washington County, OR

23 ZIPs · 611,053 residents

Jefferson County, CO

27 ZIPs · 602,283 residents

Brevard County, FL

30 ZIPs · 602,046 residents

Montgomery County, TX

22 ZIPs · 597,298 residents

Johnson County, KS

32 ZIPs · 597,056 residents

Anne Arundel County, MD

37 ZIPs · 596,547 residents

Arapahoe County, CO

17 ZIPs · 596,215 residents

Union County, NJ

26 ZIPs · 594,584 residents

Douglas County, NE

35 ZIPs · 579,737 residents

Delaware County, PA

39 ZIPs · 576,468 residents

Bristol County, MA

35 ZIPs · 576,050 residents

Greenville County, SC

23 ZIPs · 574,567 residents

South Central Connecticut County, CT

24 ZIPs · 570,724 residents

Chester County, PA

39 ZIPs · 563,387 residents

New Castle County, DE

29 ZIPs · 562,889 residents

Stanislaus County, CA

25 ZIPs · 554,470 residents

Dane County, WI

35 ZIPs · 554,086 residents

Volusia County, FL

27 ZIPs · 553,998 residents

Lancaster County, PA

53 ZIPs · 551,698 residents

Ramsey County, MN

20 ZIPs · 549,518 residents

Summit County, OH

34 ZIPs · 544,346 residents

Spokane County, WA

40 ZIPs · 539,961 residents

Adams County, CO

20 ZIPs · 535,200 residents

Camden County, NJ

34 ZIPs · 534,965 residents

Guilford County, NC

26 ZIPs · 534,872 residents

Williamson County, TX

19 ZIPs · 527,873 residents

Plymouth County, MA

35 ZIPs · 525,729 residents

Pasco County, FL

24 ZIPs · 525,025 residents

Passaic County, NJ

27 ZIPs · 520,207 residents

Sedgwick County, KS

43 ZIPs · 513,331 residents

Montgomery County, OH

32 ZIPs · 507,437 residents

Pinal County, AZ

29 ZIPs · 503,399 residents

Lake County, IN

27 ZIPs · 499,729 residents

Morris County, NJ

50 ZIPs · 497,922 residents

Tulare County, CA

40 ZIPs · 497,426 residents

Clark County, WA

19 ZIPs · 495,403 residents

Richmond County, NY

13 ZIPs · 493,194 residents

Knox County, TN

23 ZIPs · 485,441 residents

Polk County, IA

33 ZIPs · 483,665 residents

Prince William County, VA

15 ZIPs · 481,919 residents

Seminole County, FL

14 ZIPs · 479,917 residents

Onondaga County, NY

45 ZIPs · 469,800 residents

York County, PA

42 ZIPs · 468,519 residents

Ada County, ID

16 ZIPs · 468,115 residents

Sonoma County, CA

38 ZIPs · 466,089 residents

Hampden County, MA

39 ZIPs · 466,084 residents

Virginia Beach County, VA

12 ZIPs · 457,658 residents

Kane County, IL

22 ZIPs · 456,811 residents

Burlington County, NJ

33 ZIPs · 455,132 residents

Washoe County, NV

26 ZIPs · 455,019 residents

East Baton Rouge County, LA

25 ZIPs · 453,672 residents

Solano County, CA

15 ZIPs · 450,261 residents

Naugatuck Valley County, CT

26 ZIPs · 450,216 residents

Santa Barbara County, CA

24 ZIPs · 448,272 residents

Jefferson County, LA

17 ZIPs · 439,402 residents

Dakota County, MN

19 ZIPs · 437,679 residents

Berks County, PA

51 ZIPs · 433,626 residents

Monterey County, CA

31 ZIPs · 431,619 residents

Lucas County, OH

26 ZIPs · 426,852 residents

Charleston County, SC

26 ZIPs · 424,649 residents

Sarasota County, FL

23 ZIPs · 421,712 residents

Hillsborough County, NH

34 ZIPs · 420,563 residents

Cameron County, TX

16 ZIPs · 420,284 residents

Mobile County, AL

38 ZIPs · 414,903 residents

Loudoun County, VA

17 ZIPs · 411,739 residents

Waukesha County, WI

26 ZIPs · 410,203 residents

Clackamas County, OR

24 ZIPs · 409,675 residents

Manatee County, FL

20 ZIPs · 405,282 residents

St. Charles County, MO

14 ZIPs · 404,442 residents

Placer County, CA

30 ZIPs · 403,575 residents

Richland County, SC

18 ZIPs · 400,815 residents

Mercer County, NJ

22 ZIPs · 396,364 residents

Pulaski County, AR

26 ZIPs · 391,463 residents

Brazoria County, TX

16 ZIPs · 388,183 residents

Madison County, AL

22 ZIPs · 386,815 residents

Orange County, NY

46 ZIPs · 386,563 residents

Orleans County, LA

20 ZIPs · 383,974 residents

Butler County, OH

14 ZIPs · 383,954 residents

Osceola County, FL

13 ZIPs · 383,869 residents

Genesee County, MI

23 ZIPs · 383,164 residents

Lane County, OR

35 ZIPs · 382,423 residents

Chesterfield County, VA

13 ZIPs · 381,550 residents

Anoka County, MN

14 ZIPs · 379,162 residents

Lehigh County, PA

28 ZIPs · 377,961 residents

Lake County, FL

24 ZIPs · 375,031 residents

Allen County, IN

26 ZIPs · 374,098 residents

Collier County, FL

22 ZIPs · 372,022 residents

Galveston County, TX

18 ZIPs · 367,996 residents

Marion County, FL

29 ZIPs · 366,902 residents

Weld County, CO

35 ZIPs · 366,372 residents

Westmoreland County, PA

77 ZIPs · 363,905 residents

Stark County, OH

31 ZIPs · 360,641 residents

Horry County, SC

16 ZIPs · 357,377 residents

Washtenaw County, MI

14 ZIPs · 356,804 residents

Bell County, TX

17 ZIPs · 356,452 residents

Forsyth County, NC

16 ZIPs · 355,700 residents

Davis County, UT

11 ZIPs · 350,507 residents

Marion County, OR

26 ZIPs · 350,391 residents

Douglas County, CO

14 ZIPs · 350,003 residents

San Juan County, PR

17 ZIPs · 348,906 residents

Larimer County, CO

17 ZIPs · 345,178 residents

Hamilton County, TN

25 ZIPs · 341,436 residents

St. Lucie County, FL

15 ZIPs · 341,129 residents

Rockland County, NY

26 ZIPs · 336,514 residents

Rutherford County, TN

13 ZIPs · 332,753 residents

Henrico County, VA

13 ZIPs · 331,674 residents

Howard County, MD

20 ZIPs · 331,344 residents

Hamilton County, IN

13 ZIPs · 328,841 residents

McHenry County, IL

18 ZIPs · 326,051 residents

Greater Bridgeport County, CT

14 ZIPs · 325,915 residents

Escambia County, FL

19 ZIPs · 325,077 residents

Albany County, NY

39 ZIPs · 324,035 residents

Somerset County, NJ

27 ZIPs · 323,038 residents

Nueces County, TX

24 ZIPs · 322,824 residents

Luzerne County, PA

41 ZIPs · 322,472 residents

Fayette County, KY

16 ZIPs · 322,455 residents

Cumberland County, NC

17 ZIPs · 320,347 residents

Lancaster County, NE

37 ZIPs · 319,239 residents

Rockingham County, NH

36 ZIPs · 312,771 residents

Durham County, NC

10 ZIPs · 310,940 residents

Greene County, MO

18 ZIPs · 306,936 residents

Northampton County, PA

22 ZIPs · 303,593 residents

Lorain County, OH

15 ZIPs · 303,261 residents

Cumberland County, ME

38 ZIPs · 301,283 residents

Chatham County, GA

15 ZIPs · 299,045 residents

Dutchess County, NY

34 ZIPs · 298,167 residents

Marin County, CA

29 ZIPs · 295,846 residents

Spartanburg County, SC

29 ZIPs · 293,293 residents

Lexington County, SC

13 ZIPs · 291,838 residents

Leon County, FL

14 ZIPs · 290,965 residents

Santa Cruz County, CA

17 ZIPs · 290,888 residents

Thurston County, WA

14 ZIPs · 289,009 residents

Alachua County, FL

21 ZIPs · 288,771 residents

Lubbock County, TX

20 ZIPs · 287,061 residents

Boulder County, CO

18 ZIPs · 286,347 residents

Winnebago County, IL

20 ZIPs · 286,340 residents

Southeastern Connecticut County, CT

33 ZIPs · 282,685 residents

Gloucester County, NJ

26 ZIPs · 281,853 residents

Anchorage County, AK

17 ZIPs · 280,197 residents

Frederick County, MD

27 ZIPs · 279,774 residents

Dauphin County, PA

26 ZIPs · 279,503 residents

Cherokee County, GA

7 ZIPs · 278,507 residents

San Luis Obispo County, CA

23 ZIPs · 277,332 residents