First three digits · Georgia
ZIP Codes Starting with
89 ZIP codes start with 300, sorted at the North Metro, GA (SCF 300) sectional center (USPS labeling list L005, effective October 1, 2026) in Georgia: 62 residential ZIP codes across 10 counties and 27 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 300 mean?
The first digit, 3, is one of ten national areas (Alabama, Florida, Georgia, Mississippi, Tennessee and Armed Forces Americas). The first three, 300, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 300 to the North Metro, GA (SCF 300) facility. The last two digits pick the delivery area. By residents, the largest town names among the 300 ZIP codes are Marietta, Lawrenceville, Cumming, Alpharetta, Decatur and Stone Mountain.
The same facility sorts 3 prefixes, 210 ZIP codes in all: 300, 305, 306.
Where are the 300 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 300
| County | ||||||
|---|---|---|---|---|---|---|
| 30002 | Avondale Estates | DeKalb County | 5,225 | 3,077 | $90k | $532k |
| 30003 | Norcross | Gwinnett County | PO Box or unique | – | – | – |
| 30004 | Alpharetta | Fulton County | 68,707 | 1,186 | $156k | $658k |
| 30005 | Alpharetta | Fulton County | 41,836 | 2,649 | $177k | $636k |
| 30006 | Marietta | Cobb County | PO Box or unique | – | – | – |
| 30007 | Marietta | Cobb County | PO Box or unique | – | – | – |
| 30008 | Marietta | Cobb County | 35,547 | 3,725 | $75k | $308k |
| 30009 | Alpharetta | Fulton County | 21,095 | 2,316 | $127k | $641k |
| 30010 | Norcross | Gwinnett County | PO Box or unique | – | – | – |
| 30011 | Auburn | Barrow County | 21,624 | 805 | $86k | $328k |
| 30012 | Conyers | Rockdale County | 34,506 | 813 | $66k | $268k |
| 30013 | Conyers | Rockdale County | 28,297 | 998 | $75k | $308k |
| 30014 | Covington | Newton County | 41,425 | 343 | $72k | $293k |
| 30015 | Covington | Newton County | PO Box or unique | – | – | – |
| 30016 | Covington | Newton County | 62,968 | 693 | $80k | $244k |
| 30017 | Grayson | Gwinnett County | 26,620 | 2,305 | $100k | $408k |
| 30018 | Jersey | Walton County | 104 | 186 | – | $326k |
| 30019 | Dacula | Gwinnett County | 51,162 | 1,091 | $117k | $441k |
| 30021 | Clarkston | DeKalb County | 27,781 | 7,769 | $52k | $275k |
| 30022 | Alpharetta | Fulton County | 64,546 | 2,727 | $153k | $635k |
| 30023 | Alpharetta | Fulton County | PO Box or unique | – | – | – |
| 30024 | Suwanee | Gwinnett County | 88,067 | 2,114 | $144k | $551k |
| 30025 | Social Circle | Walton County | 11,182 | 159 | $96k | $322k |
| 30026 | North Metro | Gwinnett County | PO Box or unique | – | – | – |
| 30028 | Cumming | Forsyth County | 38,433 | 769 | $138k | $471k |
| 30029 | North Metro | Gwinnett County | PO Box or unique | – | – | – |
| 30030 | Decatur | DeKalb County | 31,756 | 4,714 | $127k | $632k |
| 30031 | Decatur | DeKalb County | PO Box or unique | – | – | – |
| 30032 | Decatur | DeKalb County | 42,948 | 3,147 | $63k | $274k |
| 30033 | Decatur | DeKalb County | 31,310 | 3,545 | $112k | $455k |
| 30034 | Decatur | DeKalb County | 41,847 | 2,492 | $64k | $251k |
| 30035 | Decatur | DeKalb County | 21,569 | 2,530 | $67k | $244k |
| 30036 | Decatur | DeKalb County | PO Box or unique | – | – | – |
| 30037 | Decatur | DeKalb County | PO Box or unique | – | – | – |
| 30038 | Lithonia | DeKalb County | 43,776 | 1,520 | $74k | $247k |
| 30039 | Snellville | Gwinnett County | 52,783 | 2,088 | $94k | $320k |
| 30040 | Cumming | Forsyth County | 82,532 | 1,431 | $137k | $526k |
| 30041 | Cumming | Forsyth County | 77,664 | 1,301 | $153k | $574k |
| 30042 | Lawrenceville | Gwinnett County | PO Box or unique | – | – | – |
| 30043 | Lawrenceville | Gwinnett County | 87,929 | 2,659 | $94k | $378k |
| 30044 | Lawrenceville | Gwinnett County | 101,475 | 4,086 | $77k | $330k |
| 30045 | Lawrenceville | Gwinnett County | 44,993 | 2,117 | $104k | $378k |
| 30046 | Lawrenceville | Gwinnett County | 41,850 | 2,644 | $67k | $340k |
| 30047 | Lilburn | Gwinnett County | 70,121 | 2,562 | $89k | $367k |
| 30048 | Lilburn | Gwinnett County | PO Box or unique | – | – | – |
| 30049 | Lawrenceville | Gwinnett County | PO Box or unique | – | – | – |
| 30052 | Loganville | Walton County | 79,811 | 897 | $94k | $358k |
| 30054 | Oxford | Newton County | 10,730 | 262 | $76k | $318k |
| 30055 | Mansfield | Newton County | 3,800 | 72 | $85k | $292k |
| 30056 | Newborn | Jasper County | 2,344 | 54 | $69k | $306k |
| 30058 | Lithonia | DeKalb County | 62,614 | 2,051 | $62k | $250k |
| 30060 | Marietta | Cobb County | 38,499 | 2,483 | $68k | $316k |
| 30061 | Marietta | Cobb County | PO Box or unique | – | – | – |
| 30062 | Marietta | Cobb County | 62,284 | 2,407 | $133k | $491k |
| 30063 | Marietta | Cobb County | PO Box or unique | – | – | – |
| 30064 | Marietta | Cobb County | 52,125 | 1,697 | $122k | $467k |
| 30065 | Marietta | Cobb County | PO Box or unique | – | – | – |
| 30066 | Marietta | Cobb County | 61,761 | 2,274 | $116k | $403k |
| 30067 | Marietta | Cobb County | 47,271 | 3,290 | $84k | $446k |
| 30068 | Marietta | Cobb County | 33,882 | 2,353 | $150k | $599k |
| 30069 | Marietta | Cobb County | PO Box or unique | – | – | – |
| 30070 | Porterdale | Newton County | 64 | 2,462 | $60k | $214k |
| 30071 | Norcross | Gwinnett County | 25,830 | 2,135 | $65k | $370k |
| 30072 | Pine Lake | DeKalb County | 800 | 6,250 | $79k | $310k |
| 30074 | Redan | DeKalb County | PO Box or unique | – | – | – |
| 30075 | Roswell | Fulton County | 56,263 | 1,892 | $157k | $612k |
| 30076 | Roswell | Fulton County | 46,054 | 2,872 | $118k | $490k |
| 30077 | Roswell | Fulton County | PO Box or unique | – | – | – |
| 30078 | Snellville | Gwinnett County | 41,597 | 2,403 | $98k | $353k |
| 30079 | Scottdale | DeKalb County | 4,831 | 4,122 | $83k | $348k |
| 30080 | Smyrna | Cobb County | 53,316 | 4,227 | $92k | $450k |
| 30081 | Smyrna | Cobb County | PO Box or unique | – | – | – |
| 30082 | Smyrna | Cobb County | 27,296 | 2,595 | $120k | $439k |
| 30083 | Stone Mountain | DeKalb County | 62,724 | 3,513 | $55k | $242k |
| 30084 | Tucker | DeKalb County | 38,242 | 2,570 | $81k | $361k |
| 30085 | Tucker | DeKalb County | PO Box or unique | – | – | – |
| 30086 | Stone Mountain | DeKalb County | PO Box or unique | – | – | – |
| 30087 | Stone Mountain | DeKalb County | 38,977 | 1,723 | $97k | $348k |
| 30088 | Stone Mountain | DeKalb County | 29,240 | 3,729 | $70k | $239k |
| 30090 | Marietta | Cobb County | no residents | 0 | – | – |
| 30091 | Norcross | Gwinnett County | PO Box or unique | – | – | – |
| 30092 | Peachtree Corners | Gwinnett County | 36,992 | 3,311 | $79k | $487k |
| 30093 | Norcross | Gwinnett County | 46,410 | 3,867 | $48k | $266k |
| 30094 | Conyers | Rockdale County | 33,731 | 858 | $89k | $297k |
| 30095 | Duluth | Gwinnett County | PO Box or unique | – | – | – |
| 30096 | Duluth | Gwinnett County | 71,732 | 3,155 | $75k | $375k |
| 30097 | Duluth | Fulton County | 46,876 | 1,992 | $125k | $625k |
| 30098 | Duluth | Gwinnett County | PO Box or unique | – | – | – |
| 30099 | Duluth | Gwinnett County | PO Box or unique | – | – | – |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.