| City: | Eureka, Utah |
| City Alias: | Mammoth |
| County: | Juab County |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 10:14:58 AM |
| Population: | 697 [See All] |
| Area Codes: | 385 / 435 / 801 |
| Classification: | PO Box |
| Coordinates: | 39.7820, -112.3415 |
| Land Area: | 10.361 sq mi |
| Quick Link: |
Eureka sits in a remote part of Juab County, Utah, 150 miles across rugged terrain. This is a PO Box Only Zone. There's no alternative mail delivery across the 151 square mile territory. The post office maintains 344 PO Boxes for 273 households, a 1.26 adoption rate that shows the facility also serves surrounding ranches and properties beyond the town itself.
Street names preserve the mining era identity. Leadville Row, Railroad St, Dublin St, and Silver St run through town. The ZIP includes both Main St and historic routes like Last Chance Rd and Silver City Rd. Rural carriers serve scattered properties across two routes.
697 people live here. Median age is 41.1 years. The housing stock includes 232 owner-occupied homes and 41 rentals. Median home value sits at $244,300. Work from home characterizes 44.9% of the workforce, well above rural averages. The town has 12 business establishments employing 195 people.
The city name alias MAMMOTH appears in postal records, referring to the nearby historic Mammoth mining district rather than a winter resort. Only 11 of 311 housing units are for seasonal use, which means this is a year-round community, not a vacation destination.
Street names preserve mining era identity with references to Leadville, Dublin, Railroad, Silver, and Gold alongside standard town grid.
ZIP Code 84628 has 697 residents and 273 households (average 2.55 persons per household). The median age is 41.1 years, significantly older than the state (31.3) and slightly older than the nation (38.8). The gender split is 49.9% male and 50.1% female, which is about the same as the national male share (49.1%). Largest groups are White (93.3%, much higher than the state average of 78.7% and well above the national average of 61.6%) and Hispanic or Latino (6.6%); Hispanic or Latino residents make up 6.6%, which is much lower than the national average (18.7%).
Explore More:Population Over TimeBy Age & GenderBy RaceBy GenderNativity & Citizenship
| 2020 Population: | 697Source: Census DHC |
| 2024 ACS Population Estimate: | 871Source: Census ACS |
| 2026 ZC Population Estimate: | 0Source: ZIP-Codes.com |
| Population Density: | 67.3 people per sq mile |
| Average Income: | $69,167Source: Census ACS |
| Households: | 273Source: Census DHC |
| Average House Value: | $295,400Source: Census ACS |
| Persons Per Household: | 2.55Source: Census DHC |
| Average Family Size: | 2.80Source: Census ACS |
| Group | 2010 | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Census ACS Population Estimate | -- | 582 | 691 | 655 | 674 | 737 | 744 | 519 | 523 | 643 | 669 | 629 | 927 | 991 | 871 |
| Decennial Census | 721 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 697 | -- | -- | -- | -- |
Median Age: 41.1
Male Median Age: 39.7
Female Median Age: 42.8
| Group | < 5 | 5-9 | 10-14 | 15-19 | 20-24 | 25-29 | 30-34 | 35-39 | 40-44 | 45-49 | 50-54 | 55-59 | 60-64 | 65-69 | 70-74 | 75-79 | 80-84 | 85+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Male | 13 | 28 | 22 | 29 | 34 | 19 | 12 | 20 | 23 | 19 | 31 | 28 | 11 | 16 | 15 | 11 | 5 | 12 |
| Female | 17 | 15 | 29 | 17 | 16 | 24 | 18 | 21 | 30 | 20 | 23 | 28 | 25 | 17 | 16 | 11 | 11 | 11 |
| Total | 30 | 43 | 51 | 46 | 50 | 43 | 30 | 41 | 53 | 39 | 54 | 56 | 36 | 33 | 31 | 22 | 16 | 23 |
| White: | 650 | 89.78% |
| Black: | 6 | 0.83% |
| Hispanic:* | 46 | 6.35% |
| Asian: | 2 | 0.28% |
| American Indian: | 0 | 0% |
| Hawaiian: | 3 | 0.41% |
| Other: | 17 | 2.35% |
| Total: | 724 | 100% |
| Gender | Count | % | Median Age |
|---|---|---|---|
| Males: | 348 | 49.93% | 39.7 years |
| Females: | 349 | 50.07% | 42.8 years |
| Total: | 697 | 100% | 41.1 years |
| Native, born in the United States: | 852 | 97.82% |
| Native, born in PR, Island Areas, or abroad: | 15 | 1.72% |
| Foreign born, naturalized U.S. citizen: | 0 | 0.00% |
| Foreign born, not a U.S. citizen: | 4 | 0.46% |
| Total Population: | 871 | 100% |
| Total Native Population: | 867 | 99.54% |
| Total Foreign-born Population: | 4 | 0.46% |
In 2024, the Median household income is $69,167, which is considerably lower than the national median ($80,734), is up $26,584 (62.4%) since 2011 and above its 2019 pre-pandemic level by $13,386. Family households earn a median of $85,804 versus $0 for nonfamily households (a difference of $85,804). By gender, male median income is $49,333 and female is $48,482, which is much lower than the national female median ($55,274), with a current gap of $851 that has narrowed from 2011 to 2024. The labor-force participation rate is 50.6%, which is considerably lower than the national rate (63.5%). The unemployment rate is 8.5%, which is markedly higher than the national rate (5.2%). The largest occupation group is Management (32.4%).
Explore More:Income Over TimeHousehold IncomeEmployment StatusBy Occupation
| Income Type | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Household Income | $42,583 | $44,167 | $45,833 | $47,813 | $49,167 | $52,292 | $47,500 | $55,714 | $55,781 | $58,092 | $60,529 | $67,109 | $69,130 | $69,167 |
| Median Family Income | $55,375 | $50,833 | $52,083 | $50,833 | $57,574 | $58,750 | $57,500 | $63,548 | $63,393 | $67,083 | $62,639 | $78,500 | $78,068 | $85,804 |
| Median NonFamily Income | $33,977 | $34,375 | $32,614 | $34,306 | $32,917 | $31,875 | $24,167 | $0 | $23,906 | $28,125 | $23,438 | $0 | $55,089 | $0 |
| Median Male Income | $46,500 | $42,321 | $41,786 | $41,250 | $42,250 | $43,636 | $54,688 | $56,161 | $64,375 | $68,125 | $70,625 | $70,625 | $51,827 | $49,333 |
| Median Female Income | $33,616 | $33,500 | $37,188 | $32,143 | $23,750 | $22,250 | $30,114 | $29,583 | $48,333 | $43,250 | $40,417 | $45,083 | $45,500 | $48,482 |
| Employed: | 321 | 46.25% |
| Unemployed: | 30 | 4.32% |
| Not In Labor Force: | 343 | 49.42% |
| Total: | 694 | 100% |
| Management, business, science, and arts: | 104 | 32.40% |
| Service: | 41 | 12.77% |
| Sales and Office: | 30 | 9.35% |
| Natural resources, construction, and maintenance: | 77 | 23.99% |
| Production, transportation, and material moving: | 69 | 21.50% |
| Total Civilian Employed Population: | 321 | 100% |
In 2024, the median home value is $295,400, which is below the national median ($332,700), is up $189,900 (180.00%) since 2011 and above its 2019 pre-pandemic level by $200,400. The median gross rent is $1,071, which is well under the national median ($1,413), is up $379 (54.77%) since 2011 and above its 2019 pre-pandemic level by $1,071. Of occupied housing, owners make up 96.45% (54.52% with a mortgage, 45.48% free-and-clear) and renters 3.55% - making this ZIP Code under national rental averages. The vacancy rate is 5.20%, which is considerably lower than the national rate (10.12%).
Explore More:Compare Home ValueHome Value Over TimeRent & Over TimeHousing Occupancy
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Home Value | $105,500 | $86,100 | $101,400 | $104,800 | $97,900 | $107,400 | $102,000 | $101,700 | $95,000 | $0 | $150,500 | $197,800 | $244,300 | $295,400 |
| Less than $500: | 0 | 0.00% |
| $500 to $999: | 3 | 27.27% |
| $1,000 to $1,499: | 7 | 63.64% |
| $1,500 to $1,999: | 0 | 0.00% |
| $2,000 to $2,499: | 0 | 0.00% |
| $2,500 to $2,999: | 0 | 0.00% |
| $3,000 or more: | 0 | 0.00% |
| No Rent: | 1 | 9.09% |
| Total: | 11 | 100% |
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Rent | $692 | $740 | $750 | $820 | $875 | $1,013 | $869 | $0 | $0 | $0 | $0 | $825 | $1,036 | $1,071 |
| Owner Occupied (with mortgage): | 163 | 52.58% |
| Owner Occupied (free and clear, no mortgage): | 136 | 43.87% |
| Renter Occupied: | 11 | 3.55% |
| Total Occupied Housing Units: | 310 | 100% |
| Occupied Housing Units: | 310 | 94.80% |
| Vacant Housing Units (not graphed): | 17 | 5.20% |
| Total Housing Units: | 327 | 100% |
| Single-Family Units: | 297 | 90.83% |
| Multi-Family Units: | 0 | 0.00% |
| Other Units: | 30 | 9.17% |
| Total Housing Units: | 327 | 100% |
In 2024, 18.60% of adults (25+) have a bachelor's degree or higher, which is far lower than the national rate (35.70%). High school or higher is 92.60%, which is comparable to the national rate (89.60%). The uninsured rate is 7.20%, which is comparable to the national rate (8.40%). The share of people in poverty is 10.90%, which is comparable to the national rate (8.80%), up 3.10 percentage points since 2011 and below its 2019 pre-pandemic level by 0.80 percentage points. This points to rising hardship - a weaker consumer base, greater strain on public services, and job-market headwinds. Among residents ages 3+, the largest enrollment group is high school (43.58%). College enrollment is 10.55%, which is far lower than the national rate (26.70%), indicating the community may be more oriented toward vocational/trade or direct-to-workforce opportunities.
Explore More:Educational AttainmentHealth InsurancePoverty Over TimeSchool Enrollment
| Less than 9th grade: | 9 | 1.74% |
| 9th to 12th grade, no diploma: | 29 | 5.61% |
| High school graduate (includes equivalency): | 227 | 43.91% |
| Some college, no degree: | 109 | 21.08% |
| Associate's degree: | 47 | 9.09% |
| Bachelor's degree: | 41 | 7.93% |
| Graduate or professional degree: | 55 | 10.64% |
| Total: | 517 | 100% |
| High school or higher: | 479 | 92.65% |
| Bachelor's degree or higher: | 96 | 18.57% |
| Private Insurance: | 657 | 65.57% |
| Public Insurance: | 282 | 28.14% |
| No Insurance: | 63 | 6.29% |
| Total: | 1,002 | 100% |
| Has Health Insurance: | 939 | 93.71% |
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| % of People in Poverty | 8.9% | 13.5% | 11.2% | 10.2% | 11.8% | 7.9% | 4.0% | 6.3% | 12.8% | 18.4% | 20.8% | 16.8% | 12.0% | 10.9% |
Note: Counts of Families & People in poverty are not published at the ZIP Code level due to small sample sizes. Percentages shown are survey estimates from the American Community Survey (ACS). They may differ from official poverty statistics. The U.S. Census Bureau defines poverty status by comparing a family's or individual's total income with federal poverty thresholds that vary by family size and composition.
| Nursery School, Preschool: | 3 | 1.38% |
| Kindergarten: | 5 | 2.29% |
| Elementary school (grades 1-8): | 92 | 42.20% |
| High school (grades 9-12): | 95 | 43.58% |
| College or graduate school: | 23 | 10.55% |
| Total: | 218 | 100% |
| Early Childhood: | 8 | 3.67% |
| K-12 (Primary & Secondary School): | 192 | 88.07% |
ZIP Code 84628 supports both business and residential activity. According to the Business Census (2024), there are 10 business establishments, employing about 168 people with an annual payroll of $16,070,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 2,261Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 10Source: CBP |
| 1st Quarter Payroll: | $2,954,000Source: CBP |
| Annual Payroll: | $16,070,000Source: CBP |
| # of Employees: | 168Source: CBP |
ZIP Code 84628 is located in Juab County, Utah, within the Provo-Orem-Lehi, UT Metropolitan Statistical Area (CBSA 39340) and Utah's 2nd Congressional District. This Metro area has a population of 526,810 people, about 0.13% of whom live in ZIP Code 84628. It covers 10.361 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Provo-Orem-Lehi, UTSource: Census |
| CBSA Number: | 39340Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 526,810Source: Census |
| MSA: | Source: Census |
| Land Area: | 10.361 sq miSource: Census |
| Water Area: | --Source: Census |
| Congressional District: | 02Source: USPS |
| Congressional Land Area: | 39987.95 sq miSource: Census |
| PMSA: | Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 4924080Source: Census |
| Place Name: | Eureka city; UtahSource: Census |
ZIP Code 84628 is in the Tintic School District, which serves grades Pre-Kindergarten thru 12th. There are 3 public school(s) in this ZIP Code, and we have located 3 private school(s). It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.