ZIP codes by county
ZIP Codes by County
3,121 counties have their own ZIP code list here, from the Census 2020 ZCTA-county relationship file. Los Angeles County, CA has the most residential ZIP codes (301). 9,447 ZIP codes reach into more than one county: each county page gives the share in it.
- Census2020
- ZCTA-county2020
Counties with the most ZIP codes
- Los Angeles County, CA 301 ZIPs
- Cook County, IL 177 ZIPs
- Harris County, TX 142 ZIPs
- Maricopa County, AZ 140 ZIPs
- Allegheny County, PA 117 ZIPs
- San Diego County, CA 116 ZIPs
- Suffolk County, NY 108 ZIPs
- San Bernardino County, CA 98 ZIPs
- Dallas County, TX 93 ZIPs
- Orange County, CA 90 ZIPs
- King County, WA 89 ZIPs
- Worcester County, MA 87 ZIPs
- Westmoreland County, PA 87 ZIPs
- Middlesex County, MA 83 ZIPs
- Miami-Dade County, FL 81 ZIPs
- Bexar County, TX 78 ZIPs
- Westchester County, NY 77 ZIPs
- Clark County, NV 76 ZIPs
- Tarrant County, TX 76 ZIPs
- Riverside County, CA 74 ZIPs
- Erie County, NY 72 ZIPs
- Oakland County, MI 71 ZIPs
- Hennepin County, MN 71 ZIPs
- Wayne County, MI 70 ZIPs
- Nassau County, NY 70 ZIPs
- Montgomery County, PA 70 ZIPs
- Queens County, NY 68 ZIPs
- Bergen County, NJ 66 ZIPs
- Fayette County, PA 64 ZIPs
- Santa Clara County, CA 63 ZIPs
- Jefferson County, AL 62 ZIPs
- Sullivan County, NY 62 ZIPs
- Ulster County, NY 62 ZIPs
- Berks County, PA 61 ZIPs
- Washington County, PA 61 ZIPs
- Fresno County, CA 60 ZIPs
- Lancaster County, PA 60 ZIPs
- Travis County, TX 60 ZIPs
- Pierce County, WA 60 ZIPs
- Hartford County, CT 59 ZIPs
- Schuylkill County, PA 59 ZIPs
- Hillsborough County, FL 58 ZIPs
- Bucks County, PA 58 ZIPs
- Baltimore County, MD 57 ZIPs
- Jackson County, MO 57 ZIPs
- Morris County, NJ 57 ZIPs
- Onondaga County, NY 57 ZIPs
- Pima County, AZ 56 ZIPs
- Sacramento County, CA 56 ZIPs
- Hamilton County, OH 56 ZIPs
- Broward County, FL 55 ZIPs
- St. Lawrence County, NY 54 ZIPs
- Oklahoma County, OK 54 ZIPs
- Alameda County, CA 53 ZIPs
- Kern County, CA 53 ZIPs
- Palm Beach County, FL 53 ZIPs
- Montgomery County, MD 53 ZIPs
- Indiana County, PA 53 ZIPs
- Monmouth County, NJ 52 ZIPs
- Monroe County, NY 52 ZIPs
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (ZIP codes at least 1% in the county).
Counties by state
- Alabama 67 counties
- Alaska 30 counties
- Arizona 15 counties
- Arkansas 75 counties
- California 58 counties
- Colorado 64 counties
- Connecticut 8 counties
- Delaware 3 counties
- District of Columbia 1 counties
- Florida 67 counties
- Georgia 159 counties
- Hawaii 5 counties
- Idaho 44 counties
- Illinois 102 counties
- Indiana 92 counties
- Iowa 99 counties
- Kansas 105 counties
- Kentucky 120 counties
- Louisiana 64 counties
- Maine 16 counties
- Maryland 24 counties
- Massachusetts 14 counties
- Michigan 83 counties
- Minnesota 87 counties
- Mississippi 82 counties
- Missouri 115 counties
- Montana 56 counties
- Nebraska 93 counties
- Nevada 17 counties
- New Hampshire 10 counties
- New Jersey 21 counties
- New Mexico 33 counties
- New York 62 counties
- North Carolina 100 counties
- North Dakota 53 counties
- Ohio 88 counties
- Oklahoma 77 counties
- Oregon 36 counties
- Pennsylvania 67 counties
- Puerto Rico 78 counties
- Rhode Island 5 counties
- South Carolina 46 counties
- South Dakota 67 counties
- Tennessee 95 counties
- Texas 254 counties
- Utah 29 counties
- Vermont 14 counties
- Virginia 133 counties
- Washington 39 counties
- West Virginia 55 counties
- Wisconsin 72 counties
- Wyoming 23 counties