ZIP Code · ID

ZIP 83605

Part of Caldwell, ID

Pop. 41,325·Canyon County·31st most expensive ZIP in Idaho

Median rent (all units)

$1,510/mo

Year-over-Year

+4.2%

Month-over-Month

+0.1%

vs US Median

-$422

Reported rents

Stable (Monthly)

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Most AffordableMost Expensive

ZIP 83605 · $1,510

More affordable than 72% of US ZIP codes · National median $1,932/mo

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Medians by bedroom

Rent by unit size

Studio

$1,170

1 BR

$1,390

2 BR

$1,660

3 BR

$2,320

4 BR+

$2,780

Research median

$1,660/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: October 17, 2026

From the history

What the numbers show

Cheapest month to sign

December. Asking rents in ZIP 83605 usually run 1.4% below trend in December and 0.7% above it in August, about $32 a month apart at today's median. Based on 5 years of data.

Compared with the peak

Rent in ZIP 83605 is at its highest level since Zillow's records here began in February 2021.

Past year vs. the rest of Idaho

Rent in ZIP 83605 changed +4.2% over the year to September 2026. Across the 34 Idaho ZIP codes Zillow tracks, the typical change was +6.0%.

Recent direction

Rent has risen 14 months in a row, and rose in 12 of the last 12 months.

What a typical income covers

30% of the median household income ($68,427) is $1,711 a month. That covers HUD's Fair Market Rent for up to a 2-bedroom ($1,660); a 3-bedroom is $2,320.

From Zillow's monthly rent index (ZORI) for ZIP 83605. The seasonal pattern compares Zillow’s seasonally adjusted and unadjusted series. Income is the Census median household income (5-year estimates). Fair Market Rents are HUD’s, which include utilities.

Annual cost

$18,120/yr

At $1,510/mo median

Location

CityCaldwell

StateID

CountyCanyon County

Rent Market Meter

Landlord's Market

Renter's MarketBalancedLandlord's Market

Rents are climbing (4.2% YoY), so leverage tilts toward landlords. Act sooner rather than later.

Based on rent-price momentum (+4.2% YoY, +0.1% MoM), not inventory.

Demographics

Who lives here

ZIP 83605 (Caldwell, ID) is majority owner-occupied, has a large share of families with children, 15.1% of residents hold a bachelor's degree or higher.

Population

41,325

Median income

$68,427

Median age

32.4

Renters

30.8%

Age distribution

27.6%

26%

24.4%

Under 1827.6%

18–3426%

35–5424.4%

55–6410.8%

65+11.2%

Gender

49.4%

50.6%

Male49.4%

Female50.6%

Race & ethnicity

57%

42%

White57%

Black0.5%

Hispanic42%

Asian1%

Education (25+)

19.9%

34.2%

30.9%

15.1%

No HS diploma19.9%

HS diploma34.2%

Some college30.9%

Bachelor's+15.1%

Housing tenure

69.2%

30.8%

Owner69.2%

Renter30.8%

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

2021 vs 2026

How ZIP 83605 in Caldwell, ID has changed in 5 years

Rent

$1,150 → $1,510

up 31.3%

Income

$53,022 → $68,427

up 29.1%

Population

38,420 → 41,325

up 7.6%

Renter share

36.5% → 30.8%

-5.7 pts

Bachelor's+

14.7% → 15.1%

+0.4 pts

Median age

31.2 → 32.4

+1.2 yrs

The median rent in ZIP 83605 in Caldwell, ID stood at $1,150 in 2021 and currently runs about $1,510, reflecting a 31.3% increase over the period. Local incomes tracked alongside that move, going from a median of $53,022 in 2021 to $68,427 more recently. The population has grown by 7.6% since 2021, moving from about 38,420 residents to roughly 41,325. Renters now make up 30.8% of households, compared with 36.5% five years ago. These shifts give renters and would-be renters a longer baseline for sizing up today's listings against the ZIP 83605 in Caldwell, ID market of 2021.

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About renting in ZIP 83605

Last updated: October 17, 2026

ZIP code 83605 covers Caldwell, ID. The median rent here is $1,510/mo as of October 2026. A 1-bedroom rents for a median of $1,390/mo. A 2-bedroom rents for a median of $1,660/mo.

At 26% of local median household income ($68,427/yr), ZIP 83605 ranks as affordable compared to the national benchmark of 30%. Rents have increased 4.2% over the past year.

FAQ

Frequently asked questions

How much income do you need to rent in ZIP 83605?

To keep rent at or below 30% of gross income, you would need to earn at least $60,000/year (about $29/hour full-time) to afford the median rent of $1,510/mo in ZIP 83605. The local median household income is $68,427/yr, so the typical household meets that bar.

Is rent going up or down in ZIP 83605?

Rent in ZIP 83605 has risen 4.2% over the past year as of September 2026. That is the highest level since Zillow's records here began in February 2021.

When is the cheapest time to rent in ZIP 83605?

Asking rents in ZIP 83605 are usually lowest in December, about 1.4% below their yearly trend, and highest in August, about 0.7% above it. At today's median that is a gap of roughly $32 a month. This pattern comes from 5 years of Zillow rent data.

How does ZIP 83605 compare to other ZIPs in Idaho?

ZIP 83605 is one of the more affordable among Idaho ZIP codes for rent, ranking #31 of 39 at $1,510/mo. Over the year to September 2026, rent in ZIP 83605 changed +4.2%, against a typical +6.0% across the 34 Idaho ZIP codes Zillow tracks.