What city is 50128 in?

50128 is a Jamaica, IA mailing address. By land area, 1% lies inside Jamaica; the rest is outside any Census-defined city or community.

What is the population of 50128?

About 330 people (±108), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 316.

What is the median household income in 50128?

$61,250 (±$40,635), compared with $75,059 for Iowa as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 50128?

1 USPS carrier routes with 80 residential and 0 business mailboxes (80 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 50128?

The closest, measured center to center: 50066 (5.3 mi, Dawson), 50277 (5.7 mi, Yale), 50235 (6.5 mi, Rippey), 50026 (7.7 mi, Bagley), 50220 (9.3 mi, Perry) and 50216 (11.3 mi, Lake Panorama).

50128 ZIP Code, Jamaica, IA

Q: What county is 50128 in?

50128 is mostly in Guthrie County (49% of its land), with smaller parts in Greene and Dallas counties.

50128 is a ZIP code in Jamaica, Iowa — mostly in Guthrie County (49% of its land), with smaller parts in Greene and Dallas counties. It covers 28 square miles of land. The closest ZIP codes are 50066, 50277 and 50235. 330 people live here in 160 households, fewer than in most Iowa ZIP codes. It is rural, with fewer than 100 people per square mile, and most homes are owner-occupied (82%). Median household income is $61,250, below the Iowa median of $75,059; the median age is 55.1, older than most ZIP codes.

Quick facts

Mailing city: Jamaica, IA
County: Guthrie County
Land area: 28 sq mi
Population: 330
Median household income: $61,250
Carrier routes: 1 (80 homes)

Key figures

Measure	Value
Residents	330
Households	160
Median household income	$61,250
Income per person	$38,940
Median age	55.1
Homeowners	81.9%
Median home value	$122,900
Median rent	$498
Bachelor's degree or higher	23.6%
Average commute (minutes)	36.4
Households with kids under 18	24.4%
Moved in the past year	5.5%
Below the poverty line	24.7%
Broadband internet	75.0%
Speak a non-English language at home	1.9%

Household income

% of households	Value
<$10K	3.1%
$10–15K	6.3%
$15–25K	14.4%
$25–35K	3.8%
$35–50K	13.8%
$50–75K	11.3%
$75–100K	16.3%
$100–150K	21.9%
$150–200K	3.1%
$200K+	6.3%

Age

% of all residents	Value
<10	10.6%
10–19	11.8%
20–24	5.8%
25–34	2.7%
35–44	16.4%
45–54	2.4%
55–64	18.5%
65–74	17.6%
75+	14.2%

Tenure

% of housing units	Value
Owned, with mortgage	52.5%
Owned outright	27.9%
Rented	15.8%
Vacant	3.8%

Type of building

% of housing units	Value
Detached house	86.2%
Townhome	0.0%
2–4 units	0.0%
5–19 units	11.4%
20+ units	0.0%
Mobile / other	2.4%

EDDM carrier routes

50128 has 1 USPS carrier routes with 80 residential and 0 business mailboxes. Open the EDDM route map.

Carrier routes in 50128

50128 has 1 USPS carrier routes (1 rural (R)) with 80 residential and 0 business mailboxes. Routes range from 80 homes (R001) to 80 homes (R001); the median route has 80 homes. The Census counted 160 households in 50128 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	1
250–499	0
500–749	0
750–999	0
1,000–1,499	0
1,500+	0

Every carrier route in 50128

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
R001	Rural	80	0	$87,572	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 50128 on the EDDM route map.

How route demographics are estimated

Mailbox counts come from USPS; demographics are estimates

The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).

How a route gets its figures: the block-group length-share method

We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.

Margins of error

Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.

Different years

USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.

Why some routes show identical figures

Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.

Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Nearby ZIP codes

50066 — Dawson city, IA (5.3 mi)
50277 — Yale city, IA (5.7 mi)
50235 — Rippey city, IA (6.5 mi)
50026 — Bagley city, IA (7.7 mi)
50220 — Perry city, IA (9.3 mi)
50216 — Lake Panorama CDP, IA (11.3 mi)
50129 — Jefferson city, IA (11.6 mi)
50146 — Linden city, IA (12.4 mi)

Areas that include 50128

Mail every home in 50128

Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 50128, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 50128 in?: 50128 is a Jamaica, IA mailing address. By land area, 1% lies inside Jamaica; the rest is outside any Census-defined city or community.
What county is 50128 in?: 50128 is mostly in Guthrie County (49% of its land), with smaller parts in Greene and Dallas counties.
What is the population of 50128?: About 330 people (±108), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 316.
What is the median household income in 50128?: $61,250 (±$40,635), compared with $75,059 for Iowa as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 50128?: 1 USPS carrier routes with 80 residential and 0 business mailboxes (80 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 50128?: The closest, measured center to center: 50066 (5.3 mi, Dawson), 50277 (5.7 mi, Yale), 50235 (6.5 mi, Rippey), 50026 (7.7 mi, Bagley), 50220 (9.3 mi, Perry) and 50216 (11.3 mi, Lake Panorama).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.