12421 ZIP Code — Denver, NY

Delaware County, New York

ZIP code 12421 is located in Denver, New York, within Delaware County. It covers approximately 17.19 square miles and serves a population of 224 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 845.

About ZIP code 12421

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1980s, giving the area an established character. Median home value is $321,400.

The gap between median ($85,625) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 3% is below the national average. 62% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. An above-average commute of 42 minutes suggests many residents work outside the immediate area.

Educational attainment is high — 49% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 12421 reflects a community defined by high homeownership and a significant Social Security-dependent population.

224

population

17.19

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

12421 ZIP code map

Cities in ZIP code 12421

Below are the cities the US Postal Service accepts for ZIP code 12421. Using any city not on this list may result in mail delivery delays.

City	Status
Denver	Preferred

Nearby ZIP codes

12430 Fleischmanns (3.3 mi) 12474 Roxbury (4.1 mi) 12468 Prattsville (6.2 mi) 12434 Grand Gorge (7.3 mi) 12465 Pine Hill (7.7 mi) 12406 Arkville (9.1 mi) 12455 Margaretville (9.9 mi) 13788 Hobart (10.1 mi) 12492 West Kill (10.1 mi) 12407 Ashland (10.7 mi) 12480 Shandaken (11 mi) 12410 Big Indian (11.7 mi)

Demographics updated 06/2026

Population
Total population	224
Population density	13 / sq mi
State FIPS	36
County FIPS	025

Geography
Land area	17.19 sq mi
Water area	0.01 sq mi
Latitude	42.2504
Longitude	-74.5201
Timezone	Eastern (ET)
Area code	845

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	22.0%	49.0%	37.0%
$50k – $100k	52.8%	30.9%	27.0%
$100k – $200k	8.1%	17.3%	24.4%
Over $200k	17.1%	2.8%	11.5%

Demographics & statistics

224

Population

People per sq mi

68.0

Median age

$85,625

Median household income

$62,894

Per capita income

$321,400

Median home value

Median monthly rent

100.0%

Home ownership

2.7%

Poverty rate

14.8%

Unemployment

440

Housing units

48.8%

Bachelor's or higher

Age distribution

Male Female

5–9

35–44

45–54

60–64

65–74

75–84

← Male

Female →

Age summary

Group	Count	%
Under 18	13	5.8%
18 and over	211	94.2%
65 and over	119	53.1%
Median age	68.0 years

Race & ethnicity

White 100%

Group	Count	%
White	224	100%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	22.0%	49.0%	37.0%
$50k – $100k	52.8%	30.9%	27.0%
$100k – $200k	8.1%	17.3%	24.4%
Over $200k	17.1%	2.8%	11.5%

Under $10k 5.3%

$35k–$50k 7.9%

$50k–$75k 21.1%

$75k–$100k 48.2%

$150k–$200k 7.0%

$200k+ 10.5%

Range	% of households
Under $10k	5.3%
$35k–$50k	7.9%
$50k–$75k	21.1%
$75k–$100k	48.2%
$150k–$200k	7.0%
$200k+	10.5%
Median income	$85,625

Housing

Home values

Under $50k 6.1%

$100k–$150k 3.5%

$150k–$200k 7.9%

$200k–$300k 27.2%

$300k–$500k 50.9%

$500k–$1M 4.4%

Housing overview

Metric	Value
Median home value	$321,400
Median rent / month	$0
Owner occupied	100.0%
Renter occupied	0.0%
Vacant	74.1%
Single-family detached	88.2%
Large apartment buildings	0.0%
Mobile homes	11.8%
Median rooms	5.7
Avg household size (owned)	1.96

Year built

Era	%
2020 or later	0.0%
2010–2019	4.8%
2000–2009	14.8%
1990–1999	14.1%
1980–1989	32.7%
1970–1979	22.7%
1960–1969	3.4%
1950–1959	0.0%
1940–1949	0.0%
1939 or earlier	7.5%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	10.0%
2 bedrooms	15.7%
3 bedrooms	55.7%
4 bedrooms	18.6%
5+ bedrooms	0.0%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	23.7%
2 vehicles	71.9%
3 or more	4.4%

Heating fuel

Fuel type	%
Electricity	18.4%
Propane / LP gas	7.9%
Fuel oil	65.8%
Wood	7.9%

Households & families

Household type	Count	%
Married-couple family	89	78.1%
Cohabiting couple	0	0.0%
Male householder, no spouse	13	11.4%
Female householder, no spouse	12	10.5%
Households with children under 18	11	9.6%
Households with seniors (65+)	62	54.4%
Average household size	1.96

Marital status

Status	Male	Female
Never married	5.8%	0.0%
Married	89.3%	88.9%
Separated	0.0%	11.1%
Widowed	4.9%	0.0%
Divorced	0.0%	0.0%

Education

Less than 9th grade 0.0%

Some HS, no diploma 3.3%

HS graduate 15.2%

Some college, no degree 17.5%

Associate's degree 15.2%

Bachelor's degree 13.3%

Graduate / professional 35.5%

Metric	%
HS diploma or higher	96.7%
Bachelor's or higher	48.8%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	8	61.5%
Elementary school	5	38.5%
High school	0	0.0%
College / grad school	0	0.0%

Employment

Industry of employment

Education & healthcare 62.2%

Professional & management 15.0%

Wholesale trade 7.1%

Transportation & utilities 6.3%

Construction 3.9%

Public administration 3.1%

Manufacturing 2.4%

Occupation

Category	%
Management, business & arts	64.6%
Service	0.0%
Sales & office	10.2%
Natural resources & construction	25.2%
Production & transportation	0.0%

Employment type

Type	%
Private sector	64.6%
Government	22.0%
Self-employed	13.4%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	73.2%
Carpool	0.0%
Public transit	5.5%
Walk	11.8%
Work from home	9.4%
Other means	0.0%
Avg commute (minutes)	41.8

Poverty

All people 2.7%

Under 18 years 0.0%

18 and over 2.8%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	62.3%
Retirement income	42.1%
Supplemental Security	4.4%
Cash public assistance	0.0%
Food stamps / SNAP	0.0%

Health indicators

Condition	%
Obesity	31.4%
High blood pressure	37.3%
High cholesterol	39.9%
Diabetes	11.7%
Heart disease	8.7%
Stroke	3.8%
Asthma	9.8%
Arthritis	30.4%
Kidney disease	3.6%
Pulmonary disease	8.8%
Cancer	9.2%

Behavior / access	%
Smoking	16.9%
Binge drinking	14.6%
No physical activity	23.6%
Less than 7 hrs sleep	31.6%
Depression	18.7%
Fair or poor health	13.9%
Poor mental health	12.4%
Poor physical health	11.1%
No health insurance	9.7%
Visited doctor (checkup)	81.2%
Visited dentist	67.9%
Cholesterol screening	94.0%
Teeth loss	13.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	22	10.4%

Disability	%
Any disability	3.6%
Under 18	0.0%
18–64 years	0.0%
65 and over	6.7%

Health insurance coverage

Type	%
Private insurance	47.8%
Public insurance	67.0%
No insurance	0.0%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	224	100.0%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	189	84.4%
Born in same state	189	84.4%
Born in different state	171	76.3%
Foreign born	0	0.0%
Naturalized citizen	35	15.6%
Not a US citizen	15	42.9%

Ancestry

Ancestry	Count	%
Italian	62	27.7%
French	43	19.2%

Ancestry	Count	%
Norwegian	16	7.1%
German	9	4%

Technology access

Metric	% of households
Computer access	50.9%
Internet access	100.0%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 12421

What city is ZIP code 12421 in?

ZIP code 12421 is primarily assigned to Denver, New York.

What county is ZIP code 12421 in?

ZIP code 12421 falls within Delaware County, New York.

Does ZIP code 12421 have an older population?

53% of residents in ZIP code 12421 are 65 or older, above the national average of ~17%.

Does ZIP code 12421 have a large retiree population?

62% of households in ZIP code 12421 receive Social Security income, suggesting a significant retiree or disability population.

How educated is the population of ZIP code 12421?

49% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

Does ZIP code 12421 have a large veteran population?

10% of civilians in ZIP code 12421 are veterans, above the national average of ~7%.

What timezone is ZIP code 12421 in?

ZIP code 12421 observes the EST timezone.