First three digits · Massachusetts
ZIP Codes Starting with
47 ZIP codes start with 018, sorted at the Middlesex-Esx, MA (SCF 018) sectional center (USPS labeling list L005, effective October 1, 2026) in Massachusetts: 32 residential ZIP codes across 2 counties and 15 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 018 mean?
The first digit, 0, is one of ten national areas (Connecticut, Massachusetts, Maine, New Hampshire, New Jersey, Puerto Rico, Rhode Island, Vermont, U.S. Virgin Islands and Armed Forces Europe). The first three, 018, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 018 to the Middlesex-Esx, MA (SCF 018) facility. The last two digits pick the delivery area. By residents, the largest town names among the 018 ZIP codes are Lowell, Lawrence, Haverhill, Methuen, Woburn and Andover.
The same facility sorts 3 prefixes, 87 ZIP codes in all: 018, 019, 055.
Where are the 018 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 018
| County | ||||||
|---|---|---|---|---|---|---|
| 01801 | Woburn | Middlesex County | 41,939 | 3,301 | $111k | $674k |
| 01803 | Burlington | Middlesex County | 26,274 | 2,331 | $146k | $741k |
| 01805 | Burlington | Middlesex County | PO Box or unique | – | – | – |
| 01810 | Andover | Essex County | 35,648 | 1,168 | $173k | $856k |
| 01812 | Andover | Essex County | PO Box or unique | – | – | – |
| 01813 | Woburn | Middlesex County | PO Box or unique | – | – | – |
| 01815 | Woburn | Middlesex County | PO Box or unique | – | – | – |
| 01821 | Billerica | Middlesex County | 30,143 | 1,817 | $149k | $615k |
| 01822 | Billerica | Middlesex County | PO Box or unique | – | – | – |
| 01824 | Chelmsford | Middlesex County | 26,650 | 1,475 | $140k | $620k |
| 01825 | North Reading | Middlesex County | PO Box or unique | – | – | – |
| 01826 | Dracut | Middlesex County | 32,629 | 1,570 | $114k | $474k |
| 01827 | Dunstable | Middlesex County | 3,408 | 207 | $209k | $674k |
| 01830 | Haverhill | Essex County | 26,530 | 1,913 | $79k | $467k |
| 01831 | Haverhill | Essex County | PO Box or unique | – | – | – |
| 01832 | Haverhill | Essex County | 26,386 | 2,323 | $83k | $429k |
| 01833 | Georgetown | Essex County | 8,432 | 658 | $154k | $654k |
| 01834 | Groveland | Essex County | 6,777 | 763 | $142k | $611k |
| 01835 | Haverhill | Essex County | 14,782 | 1,893 | $114k | $469k |
| 01840 | Lawrence | Essex County | 8,522 | 16,710 | $42k | – |
| 01841 | Lawrence | Essex County | 52,769 | 17,341 | $57k | $403k |
| 01842 | Lawrence | Essex County | PO Box or unique | – | – | – |
| 01843 | Lawrence | Essex County | 27,445 | 8,134 | $68k | $429k |
| 01844 | Methuen | Essex County | 53,420 | 2,417 | $113k | $500k |
| 01845 | North Andover | Essex County | 32,494 | 1,230 | $141k | $733k |
| 01850 | Lowell | Middlesex County | 17,740 | 13,035 | $70k | $391k |
| 01851 | Lowell | Middlesex County | 33,403 | 10,345 | $92k | $467k |
| 01852 | Lowell | Middlesex County | 37,144 | 7,469 | $81k | $424k |
| 01853 | Lowell | Middlesex County | PO Box or unique | – | – | – |
| 01854 | Lowell | Middlesex County | 30,081 | 7,596 | $73k | $412k |
| 01860 | Merrimac | Essex County | 6,748 | 794 | $123k | $553k |
| 01862 | North Billerica | Middlesex County | 12,129 | 1,332 | $139k | $586k |
| 01863 | North Chelmsford | Middlesex County | 9,796 | 2,199 | $145k | $492k |
| 01864 | North Reading | Middlesex County | 15,765 | 1,198 | $148k | $711k |
| 01865 | Nutting Lake | Middlesex County | PO Box or unique | – | – | – |
| 01866 | Pinehurst | Middlesex County | PO Box or unique | – | – | – |
| 01867 | Reading | Middlesex County | 25,612 | 2,570 | $166k | $809k |
| 01876 | Tewksbury | Middlesex County | 31,004 | 1,488 | $130k | $577k |
| 01879 | Tyngsboro | Middlesex County | 12,550 | 749 | $129k | $553k |
| 01880 | Wakefield | Middlesex County | 27,793 | 3,763 | $134k | $724k |
| 01885 | West Boxford | Essex County | PO Box or unique | – | – | – |
| 01886 | Westford | Middlesex County | 24,690 | 816 | $187k | $749k |
| 01887 | Wilmington | Middlesex County | 23,336 | 1,375 | $168k | $681k |
| 01888 | Woburn | Middlesex County | PO Box or unique | – | – | – |
| 01889 | North Reading | Middlesex County | PO Box or unique | – | – | – |
| 01890 | Winchester | Middlesex County | 23,406 | 3,880 | $230k | $1.22M |
| 01899 | Andover | Essex 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.