27577 ZIP Code, Smithfield, NC
27577 is a ZIP code in Smithfield, North Carolina in Johnston County. It covers 104 square miles of land. The closest ZIP codes are 27568, 27593 and 27524. 28,354 people live here in 10,297 households. With about 273 people per square mile it is lightly settled, and most homes are owner-occupied (73%). Median household income is $62,758, below the North Carolina median of $72,388.
Quick facts
- Mailing city: Smithfield, NC
- County: Johnston County
- Land area: 104 sq mi
- Population: 28,354
- Median household income: $62,758
- Carrier routes: 17 (11,529 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 28,354 |
| Households | 10,297 |
| Median household income | $62,758 |
| Income per person | $30,924 |
| Median age | 41.3 |
| Homeowners | 73.2% |
| Median home value | $260,300 |
| Median rent | $837 |
| Bachelor's degree or higher | 20.2% |
| Average commute (minutes) | 27 |
| Households with kids under 18 | 30.6% |
| Moved in the past year | 7.4% |
| Below the poverty line | 18.4% |
| Broadband internet | 86.2% |
| Speak a non-English language at home | 17.5% |
Household income
| % of households | Value |
|---|---|
| <$10K | 8.9% |
| $10–15K | 4.6% |
| $15–25K | 8.0% |
| $25–35K | 7.8% |
| $35–50K | 11.1% |
| $50–75K | 15.3% |
| $75–100K | 14.5% |
| $100–150K | 15.7% |
| $150–200K | 8.6% |
| $200K+ | 5.5% |
Age
| % of all residents | Value |
|---|---|
| <10 | 11.8% |
| 10–19 | 13.1% |
| 20–24 | 6.2% |
| 25–34 | 10.2% |
| 35–44 | 13.9% |
| 45–54 | 14.4% |
| 55–64 | 13.5% |
| 65–74 | 9.9% |
| 75+ | 7.0% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 46.3% |
| Owned outright | 21.5% |
| Rented | 24.5% |
| Vacant | 7.6% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 68.9% |
| Townhome | 4.2% |
| 2–4 units | 5.8% |
| 5–19 units | 3.0% |
| 20+ units | 5.4% |
| Mobile / other | 12.6% |
Businesses in 27577
829 business establishments with 11,205 employees (ZIP Codes Business Patterns 2023).
- Retail Trade: 171
- Construction: 105
- Health Care and Social Assistance: 97
- Accommodation and Food Services: 88
- Other Services (except Public Administration): 69
- Finance and Insurance: 58
- Professional, Scientific, and Technical Services: 56
- Administrative and Support and Waste Management and Remediation Services: 42
EDDM carrier routes
27577 has 17 USPS carrier routes with 11,529 residential and 903 business mailboxes. Open the EDDM route map.
Carrier routes in 27577
27577 has 17 USPS carrier routes (6 city (C), 11 rural (R)) with 11,529 residential and 903 business mailboxes. Routes range from 322 homes (C002) to 963 homes (R008); the median route has 762 homes. The Census counted 10,297 households in 27577 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 6 |
| 500–749 | 2 |
| 750–999 | 9 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 27577 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C001 — USPS business mailboxes 278, 479 homes
- Route C002 — USPS business mailboxes 139, 322 homes
- Route C005 — USPS business mailboxes 94, 897 homes
- Route R005 — USPS business mailboxes 81, 873 homes
- Route C006 — USPS business mailboxes 75, 493 homes
Select these 5 routes on the route map
Every carrier route in 27577
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C001 | City | 479 | 278 | $42,296 | — | — | — |
| C002 | City | 322 | 139 | $42,296 | — | — | — |
| C003 | City | 396 | 57 | $40,179 | — | — | — |
| C004 | City | 499 | 2 | $106,068 | — | — | — |
| C005 | City | 897 | 94 | $42,296 | — | — | — |
| C006 | City | 493 | 75 | $36,510 | — | — | — |
| R001 | Rural | 858 | 6 | $87,353 | — | — | — |
| R002 | Rural | 762 | 22 | $36,510 | — | — | — |
| R003 | Rural | 873 | 14 | $94,083 | — | — | — |
| R004 | Rural | 808 | 48 | $58,604 | — | — | — |
| R005 | Rural | 873 | 81 | $42,296 | — | — | — |
| R006 | Rural | 678 | 27 | $80,221 | — | — | — |
| R007 | Rural | 771 | 9 | $40,179 | — | — | — |
| R008 | Rural | 963 | 25 | $58,604 | — | — | — |
| R009 | Rural | 591 | 20 | $40,179 | — | — | — |
| R010 | Rural | 797 | 5 | $61,108 | — | — | — |
| R011 | Rural | 469 | 1 | $87,353 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 27577 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
- 27568 — Pine Level town, NC (5.9 mi)
- 27593 — Wilson's Mills town, NC (6.6 mi)
- 27524 — Four Oaks town, NC (7.2 mi)
- 27576 — Selma town, NC (7.5 mi)
- 27555 — Micro town, NC (9.3 mi)
- 27569 — Princeton town, NC (10.6 mi)
- 27520 — Clayton town, NC (11.1 mi)
- 27527 — Archer Lodge town, NC (11.4 mi)
Areas that include 27577
- Smithfield, NC ZIP codes — 1 ZIP code
- Selma, NC ZIP codes — 2 ZIP codes
- Wilson's Mills, NC ZIP codes — 4 ZIP codes
- Pine Level, NC ZIP codes — 3 ZIP codes
- Johnston County ZIP codes — 18 ZIP codes
- North Carolina ZIP code data
Where it ranks
Mail every home in 27577
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) 27577, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 27577 in?
- 27577 is a Smithfield, NC mailing address. By land area, 12% lies inside Smithfield and 2% lies inside Wilson's Mills; the rest is outside any Census-defined city or community.
- What county is 27577 in?
- 27577 is in Johnston County.
- What is the population of 27577?
- About 28,354 people (±1,640), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 24,972.
- What is the median household income in 27577?
- $62,758 (±$9,003), compared with $72,388 for North Carolina as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 27577?
- 17 USPS carrier routes with 11,529 residential and 903 business mailboxes (12,433 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 27577?
- The closest, measured center to center: 27568 (5.9 mi, Pine Level), 27593 (6.6 mi, Wilson's Mills), 27524 (7.2 mi, Four Oaks), 27576 (7.5 mi, Selma), 27555 (9.3 mi, Micro) and 27569 (10.6 mi, Princeton).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.