Skip to main content
USAvizUSAviz

Local data snapshots and weekly insights for every place in America.

Explore

  • Insights
  • Search
  • Browse states
  • Browse metros

Company

  • About
  • Methodology
  • Sources
  • Embed Our Data
  • Contact
Privacy·Terms·Do Not Sell or Share

© 2026 USAviz.com. All rights reserved.

USAvizUSAviz
Insights
About
Home
307
  1. Home
  2. Area Codes
  3. Area code 307
Wyoming (WY)Mountain Time (MT)

Area Code 307

Wyoming (WY) * Casper, Cheyenne, Laramie, Gillette, Afton, Aladdin, Albin, Alcova * Mountain Time (MT)

567.3K

Population

173

ZIP codes

Wyoming

Primary state

Mountain Time (MT)

Time zones

What stands out

  • Coverage: 567.3K people across 173 ZIP codes.
  • Major cities: Casper, Cheyenne, Laramie.
Primary state:Wyoming (WY)/Major cities:Casper, Cheyenne, Laramie, Gillette, Afton, Aladdin, Albin, Alcova

Browse sections

Basics

Percentiles compare this area code to other area codes nationwide.

Population

567.3K

ZIP codes

173

Median age

39.6 yrs

Population density

9/sq mi

Mean commute time

19 min

Avg. household size

2.4

Neighbors

Neighboring area codes

208308406435605970986
Notes & Sources
  • Area-code boundaries can change over time; verify official assignments with NANPA for critical use.
  • This page aggregates ZIP-based crosswalks for orientation and does not indicate phone-number availability.

Data freshness

ACS 5-year
2020–2024
Page updated
2026-02-23

Release schedule and upstream dates: Sources.

Data sources

U.S. Census (ACS 5-year)U.S. Census TIGER/LineNANPA

Derived statistics

  • Area codes are not Census geographies; statistics are estimated by aggregating ZCTA (ZIP) values for associated ZIPs.
  • ZIP↔area code associations are derived from NPA boundary polygons and ZCTA centroid points, and can be approximate.
  • Median age, mean commute, and household size are population-weighted; population density uses summed ZIP land area.
Area code overlays and service areas are primarily governed by NANPA; this page uses aggregated geographic overlays for orientation only.

Data accuracy & methodology

This report aggregates 2020–2024 ACS 5-year estimates and geographic overlays for orientation. Area code service areas can cross ZIP/state boundaries and change over time; verify official assignments with NANPA for critical use.