ZIP code 37031: Hartsville/Trousdale County, TN
ZIP code 37031 is in Hartsville/Trousdale County (23% of residents) and Castalian Springs (14%), in Sumner County (77%) and Trousdale County (23%), Tennessee. 63% of its residents live outside city limits. It is in Tennessee's 7th congressional district. Its state senate district is State Senate District 18; its state house district is State House District 35.
See it on the mapAll of Tennessee
City and county
| City or town | Share of ZIP residents |
|---|---|
| Hartsville/Trousdale County | 23% |
| Castalian Springs | 14% |
| County | Share of ZIP residents |
|---|---|
| Sumner County | 77% |
| Trousdale County | 23% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| District 6 | 77% |
| District 6 | 17% |
| District 5 | 6.5% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Tennessee's 7th congressional district (TN-07) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (TN-07) | Matt Van Epps (R) | 202-225-2811 | 100% |
| U.S. Senator | Bill Hagerty (R) | 202-224-4944 · contact form | statewide |
| U.S. Senator | Marsha Blackburn (R) | 202-224-3344 · contact form | statewide |
| State Senator (State Senate District 18) | Ferrell Haile (R) | 100% | |
| State Representative (State House District 35) | William Slater (R) | 100% |
Elected in 2024 under TN's previous congressional map; this district's lines changed for the 120th Congress (seated January 3, 2027).
Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).
Local government
- Hartsville/Trousdale County laws: search for the Hartsville/Trousdale County, Tennessee code of ordinances
- Castalian Springs laws: search for the Castalian Springs, Tennessee code of ordinances
- Sumner County website: http://www.sumnertn.org
- Sumner County laws: search for the Sumner County, Tennessee code of ordinances
- Trousdale County website: https://www.trousdalecountytn.gov/
- Trousdale County laws: search for the Trousdale County, Tennessee code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 18 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 35 | 100% |
Voting precincts
3 voting precincts overlap ZIP 37031. Map them, with each precinct's share of the ZIP's residents.
Get this in your AI agent
Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:zcta:37031")
ZIP 37031 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code; PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.