Area Code 605

South Dakota (SD) • Sioux Falls, Rapid City, Brookings, Spearfish, Aberdeen, Agar, Akaska, Alcester • Central Time (CT)

What Stands Out

•Coverage: 906.1K people across 374 ZIP codes.
•Major cities: Sioux Falls, Rapid City, Brookings.

Spotlight: Coverage

Snapshot highlights for area code 605.

Income

56th

Home values

59th

Poverty rate

56th

Area Code Basics

Primary State

South Dakota (SD)

States Served

South Dakota (SD)

Major Cities

Sioux Falls, Rapid City, Brookings, Spearfish, Aberdeen, Agar, Akaska, Alcester

Time Zone(s)

Central Time (CT), Mountain Time (MT)

Est. Population

906.1K

ZIP Codes

374

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.