ZIP Code 37166 — Smithville city, TN Demographics & Data

ZIP code 37166 covers Smithville, TN in DeKalb County with a population of about 15,116.

At a glance, the area shows median age of 42.5 versus a U.S. median of about 38.9.

It sits in telephone area codes 615, 629; U.S. House district TN-6; the NASHVILLE media market.

Median household income in ZIP 37166 is about $46,713 — about 38% below the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 22.0%; unemployment rate near 4.6%; 18.2% of adults with a bachelor’s degree or higher (about 15.5 points below the national share (33.7%)).

Labor and commute patterns include leading industry context around Manufacturing, Healthcare, and Retail trade; about 6.5% of workers reporting work-from-home (about 8.6 points below the U.S. share (15.2%)); a mean commute of about 180.0 minutes (U.S. average near 26.8).

Median home value is about $183,600 — about 47% below the U.S. median home value ($348,079).

Housing tenure and rents show median gross rent around $571 (about 51% below the U.S. median rent ($1,163)), and owner-occupancy near 65.6% (roughly in line with the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 37166 in Smithville, TN, a household would need roughly $51,000 in annual income under a 20% down, 30-year loan at 6.8% (illustrative), keeping housing costs near 28% of income. Estimated monthly PITI is about $1,179. That is roughly in line with the local median household income ($46,713). Rates, taxes, insurance, and HOA fees vary — treat this as a planning estimate, not a lender quote.

FEMA’s National Risk Index rates natural-hazard risk for Smithville city, TN as Very Low (composite score 25.5), which is relatively lower than many U.S. communities. The strongest component scores on US5 are hurricane (47.7) and flood (34.5). These scores are county-linked NRI values published for planning context — all ZIP codes in the same county share the same composite score on US5. Useful when comparing insurance and disaster exposure across areas, not a substitute for a parcel-level flood or fire determination.

Climate normals for Smithville city, TN show little to no average snow and around 57.0 inches of annual precipitation.

IRS migration statistics show a net inflow of about 536 for ZIP 37166 (Smithville city, TN) on US5’s published series — a signal of people/tax filers moving in relative to those leaving. Inflows often track job growth, housing demand, or lifestyle migration; treat the figure as a directional indicator rather than a precise headcount.