37186 ZIP Code, Westmoreland, TN

37186 is a ZIP code in Westmoreland, Tennessee — mostly in Sumner County (54% of its land), with smaller parts in Macon County. It covers 108 square miles of land. The closest ZIP codes are 42120, 37022 and 42153. 10,709 people live here in 3,810 households. It is rural, with fewer than 100 people per square mile, and most homes are owner-occupied (71%). Median household income is $59,545, below the Tennessee median of $69,595.

Quick facts

Key figures

MeasureValue
Residents10,709
Households3,810
Median household income$59,545
Income per person$29,825
Median age40.4
Homeowners70.6%
Median home value$221,500
Median rent$988
Bachelor's degree or higher10.4%
Average commute (minutes)34.8
Households with kids under 1838.9%
Moved in the past year8.3%
Below the poverty line15.0%
Broadband internet85.9%
Speak a non-English language at home2.6%

Household income

% of householdsValue
<$10K3.3%
$10–15K1.8%
$15–25K10.3%
$25–35K8.7%
$35–50K12.3%
$50–75K22.5%
$75–100K14.1%
$100–150K17.5%
$150–200K3.2%
$200K+6.4%

Age

% of all residentsValue
<1010.2%
10–1914.8%
20–247.1%
25–3412.6%
35–4413.7%
45–5414.6%
55–6413.1%
65–749.6%
75+4.2%

Tenure

% of housing unitsValue
Owned, with mortgage34.1%
Owned outright27.4%
Rented25.3%
Vacant13.2%

Type of building

% of housing unitsValue
Detached house65.5%
Townhome0.6%
2–4 units2.9%
5–19 units1.1%
20+ units1.1%
Mobile / other28.8%

Businesses in 37186

102 business establishments with 897 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

37186 has 9 USPS carrier routes with 4,549 residential and 100 business mailboxes. Open the EDDM route map.

Carrier routes in 37186

37186 has 9 USPS carrier routes (9 rural (R)) with 4,549 residential and 100 business mailboxes. Routes range from 181 homes (R009) to 707 homes (R008); the median route has 518 homes. The Census counted 3,810 households in 37186 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per routeRoutes
1–2491
250–4992
500–7496
750–9990
1,000–1,4990
1,500+0

Best routes in 37186 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

  1. Route R006 — USPS business mailboxes 28, 485 homes
  2. Route R008 — USPS business mailboxes 27, 707 homes
  3. Route R007 — USPS business mailboxes 14, 499 homes
  4. Route R004 — USPS business mailboxes 13, 518 homes
  5. Route R002 — USPS business mailboxes 6, 552 homes

Select these 5 routes on the route map

Every carrier route in 37186

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
R001Rural5185$50,140———
R002Rural5526$76,947———
R003Rural5251$50,508———
R004Rural51813$50,508———
R005Rural5645$67,199———
R006Rural48528$76,947———
R007Rural49914$76,947———
R008Rural70727$76,947———
R009Rural1811$50,140———

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 37186 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

Areas that include 37186

Where it ranks

Mail every home in 37186

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) 37186, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 37186 in?
37186 is a Westmoreland, TN mailing address. By land area, 4% lies inside Westmoreland; the rest is outside any Census-defined city or community.
What county is 37186 in?
37186 is mostly in Sumner County (54% of its land), with smaller parts in Macon County.
What is the population of 37186?
About 10,709 people (±969), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 10,263.
What is the median household income in 37186?
$59,545 (±$9,394), compared with $69,595 for Tennessee as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 37186?
9 USPS carrier routes with 4,549 residential and 100 business mailboxes (4,649 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 37186?
The closest, measured center to center: 42120 (6.4 mi), 37022 (7.8 mi, Hartsville/Trousdale County, TN), 42153 (11.6 mi), 42164 (12.2 mi, Scottsville), 37074 (12.4 mi, Hartsville/Trousdale County, TN) and 37083 (12.9 mi, Lafayette).

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