County ZIP codes · Massachusetts · FIPS 25025

Suffolk County, MA ZIP Codes

Suffolk County, Massachusetts has 55 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 37 residential and 18 for PO boxes or a single organization. 35 of the residential ones lie mainly in Suffolk County and 2 mainly in a neighboring county; 3 cross the county line. Median household income ranges from $43,136 in 02121 (Dorchester) to $172,124 in 02210 (Boston) (Census Bureau, ACS 2020-2024).

ACS2020-24
Census2020

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

02121 · $43k 02210 · $172k

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $78,679 and $132,210.

They carry 20 postal town names.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 37 residential ZIP codes in Suffolk County

35 ZIP codes lie mainly in Suffolk County; 2 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Suffolk County, largest first; "In this county" is the share of the ZIP's land in the county
						In this county
02151	Revere	60,012	10,519	$87k	$597k	100%
02124	Dorchester Center	56,216	18,941	$82k	$651k	100%
02128	East Boston	43,345	8,626	$90k	$668k	100%
02135	Brighton	43,149	16,596	$91k	$681k	100%
02130	Jamaica Plain	40,055	11,315	$132k	$822k	100%
02150	Chelsea	39,908	18,025	$72k	$494k	100%
02136	Hyde Park	37,265	8,105	$97k	$578k	100%
02127	South Boston	36,769	17,866	$164k	$864k	100%
02125	Dorchester	33,662	15,527	$83k	$657k	100%
02131	Roslindale	31,151	11,173	$111k	$665k	100%
02115	Boston	29,705	41,779	$55k	$945k	100%
02121	Dorchester	29,040	15,398	$43k	$590k	100%
02118	Boston	28,946	26,605	$98k	$1.06M	100%
02119	Roxbury	27,377	16,952	$49k	$689k	100%
02126	Mattapan	26,583	14,542	$66k	$543k	100%
02132	West Roxbury	26,444	5,437	$139k	$746k	100%
02215	Boston	24,581	27,807	$72k	$750k	95%
02122	Dorchester	23,479	13,836	$86k	$670k	100%
02116	Boston	21,978	33,864	$127k	$1.56M	100%
02129	Charlestown	20,032	14,806	$157k	$912k	100%
02152	Winthrop	18,759	11,321	$116k	$650k	100%
02134	Allston	17,667	14,317	$79k	$657k	100%
02120	Roxbury Crossing	15,283	24,690	$64k	$886k	100%
02114	Boston	14,418	32,546	$132k	$924k	100%
02111	Boston	8,407	42,893	$87k	$1.03M	100%
02210	Boston	6,971	7,553	$172k	$1.19M	100%
02113	Boston	6,385	65,825	$113k	$662k	100%
02108	Boston	3,794	13,847	$213k	$1.67M	100%
02109	Boston	3,612	21,247	$159k	$958k	100%
02110	Boston	2,342	13,084	$138k	$1.18M	100%
02163	Boston	1,817	9,929	$85k	–	100%
02199	Boston	1,292	22,667	$122k	–	100%
02133	Boston	62	4,769	–	–	100%
02203	Boston	no residents	0	–	–	100%
02205	Boston	no residents	0	–	–	100%

Partly in Suffolk County

Residential ZIP codes mainly in another county that reach at least 1% into Suffolk County, by their share here
						In this county
02467	Chestnut Hill	23,001	4,688	$169k	$1.34M	12%
02445	Brookline	22,560	8,640	$140k	$1.23M	3%

Download the 55 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

3 ZIP codes of Suffolk County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Suffolk County and in the neighboring counties
ZIP	In Suffolk	Elsewhere
02215	95%	Norfolk County 5%
02467	12%	Norfolk County 59%; Middlesex County 29%
02445	3%	Norfolk County 97%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

PO Box and single-organization ZIP codes

ZIP codes in Suffolk County without a residential area (GeoNames postal codes)
ZIP	Postal name
02112	Boston
02117	Boston
02123	Boston
02137	Readville
02196	Boston
02201	Boston
02204	Boston
02206	Boston
02211	Boston
02217	Boston
02222	Boston
02241	Boston
02266	Boston
02283	Boston
02284	Boston
02293	Boston
02297	Boston
02298	Boston

Source: GeoNames postal codes (CC BY 4.0).

Which first three digits do Suffolk County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Suffolk County's ZIP codes use 3 prefixes: 021, 022 and 024.

Three-digit prefixes of Suffolk County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Suffolk County's
Prefix	Sectional center	Here	All codes
021	Boston, MA (SCF 021)	36	62
022	Boston, MA (SCF 021)	17	20
024	Boston, MA (SCF 021)	2	36

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.

Where are the ZIP codes of Suffolk County?