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ZIP Code · MA

ZIP 01821

Pop. 30,143·Middlesex County·91st most expensive ZIP in Massachusetts
Median rent (all units)
$2,742/mo
Year-over-Year
+1.3%
Month-over-Month
-1.1%
vs US Median
+$777
Falling (Monthly)
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Most AffordableMost Expensive
ZIP 01821 · $2,742
More expensive than 85% of US ZIP codes · National median $1,965/mo
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Medians by bedroom

Rent by unit size

Studio
$2,040
1 BR
$2,240
2 BR
$2,940
3 BR
$3,530
4 BR+
$3,890
Research median
$2,940/mo

Bedroom estimates are gross rents that include essential utilities (electricity, water, gas, sewer, trash).

Rent trends

12-month history

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Last updated: July 20, 2026

Annual cost
$32,904/yr
At $2,742/mo median
Location
StateMA
CountyMiddlesex County
Rent Market Meter
Balanced Market
Renter's MarketBalancedLandlord's Market
Rents are roughly steady, with neither renters nor landlords holding a strong edge right now.
Based on rent-price momentum (+1.3% YoY, -1.1% MoM), not inventory.
Demographics

Who lives here

ZIP 01821 (Billerica, MA) is majority owner-occupied, has a median income above the national average, 40.2% of residents hold a bachelor's degree or higher.

Population
30,143
Median income
$149,042
Median age
44.3
Renters
17.8%
Age distribution
17.4%
20.8%
25.9%
16.6%
19.3%
Under 1817.4%
18–3420.8%
35–5425.9%
55–6416.6%
65+19.3%
Gender
49.2%
50.8%
Male49.2%
Female50.8%
Race & ethnicity
79.8%
White79.8%
Black2.7%
Hispanic3.5%
Asian10.1%
Other3.9%
Education (25+)
26.4%
28.2%
40.2%
No HS diploma5.3%
HS diploma26.4%
Some college28.2%
Bachelor's+40.2%
Housing tenure
82.2%
17.8%
Owner82.2%
Renter17.8%

Source: U.S. Census Bureau · ACS 2024 5-Year Estimates

2021 vs 2026

How ZIP 01821 in Billerica, MA has changed in 5 years

Income
$126,146 → $149,042
up 18.2%
Population
31,499 → 30,143
down 4.3%
Renter share
20.8% → 17.8%
-3.0 pts
Bachelor's+
40.8% → 40.2%
-0.6 pts
Median age
42 → 44.3
+2.3 yrs

Local incomes tracked alongside that move, going from a median of $126,146 in 2021 to $149,042 more recently. Headcount in the area went from 31,499 to 30,143 between 2021 and 2024, a 4.3% change. About 17.8% of households rent today, against 20.8% in 2021.

Community

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Local insights

Tips for renters in ZIP 01821

About renting in ZIP 01821

Last updated: July 20, 2026

ZIP code 01821 covers Billerica, MA. The median rent here is $2,742/mo as of July 2026. A 1-bedroom rents for a median of $2,240/mo. A 2-bedroom rents for a median of $2,940/mo.

At 22% of local median household income ($149,042/yr), ZIP 01821 ranks as affordable compared to the national benchmark of 30%. Rents have increased 1.3% over the past year.

FAQ

Frequently asked questions

How much is rent in ZIP code 01821?

As of July 20, 2026, the median monthly rent in ZIP 01821 (Billerica, MA) is $2,742. This is based on aggregated data from public sources and community submissions.

How does ZIP 01821 rent compare to the US average?

ZIP 01821's median rent of $2,742/mo is $777 (40%) above the US national median of $1,965/mo.

How does ZIP 01821 compare to other ZIPs in Massachusetts?

ZIP 01821 falls in the middle range for Massachusetts, ranking #91 out of 168 ZIPs at $2,742/mo.

How much income do you need to rent in ZIP 01821?

To keep rent at or below 30% of gross income, you would need to earn at least $110,000/year (~$53/hour full-time) to afford the median rent of $2,742/mo in ZIP 01821. The local median household income is $149,042/yr, meaning the typical household meets that threshold.

Is rent going up or down in ZIP 01821?

Rent in ZIP 01821 has increased 1.3% over the past year as of July 20, 2026, putting upward pressure on renter budgets.

Is ZIP 01821 an affordable place to rent?

ZIP 01821 is considered very affordable for renters. At $2,742/mo, rent takes approximately 22% of the local median household income ($149,042/yr). The standard benchmark is 30%. ZIP 01821 falls comfortably within that range.

What percentage of ZIP 01821 residents rent vs. own?

According to Census data, approximately 17.8% of ZIP 01821 households are renters, while 82.2% are owner-occupied. ZIP 01821 leans toward homeownership, which can mean a smaller rental inventory.

How does ZIP 01821 compare to the rest of Billerica?

ZIP 01821 is pricier than Billerica as a whole. At $2,742/mo, it's $1 above the Billerica citywide median of $2,741/mo.

When was rent data for ZIP 01821 last updated?

Rent data for ZIP 01821 reflects July 20, 2026. RentDataNow refreshes all data monthly using public and private datasets.
Income Affordability
22%
VERY AFFORDABLE

At $2,742/mo, rent takes ~22% of ZIP 01821's median household income ($149,042/yr). The standard benchmark is 30%.

ZIP 01821 22%Benchmark 30%
State income tax5%
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Schools nearby

Public schools near ZIP 01821 (Billerica, MA)

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