ZIP codes
384
Area Code 605
Explore ZIP codes in area code 605 — covering IA, MN, ND, NE, SD — 384 ZIP codes — 908,625 residents. Population, income, and housing at a glance.
Population
908,625
States
IA, MN, ND, NE, SD
Median household income (avg.)
$72,593
Average home value
$174,474
Where is area code 605?
Area code 605 maps to 384 indexable ZIP codes on US5 across IA, MN, ND, NE, and SD, with a combined ZIP-area population of about 908,625.
Among places with the most population in this NPA on US5 are Sioux Falls, SD, Rapid City, SD, Aberdeen, SD, Watertown, SD, and Brookings, SD. Open any ZIP below for full demographics, housing, and nearby services.
The most populous ZIP currently listed for 605 is 57106 (about 51,780 residents).
Income and housing in 605
Across ZIPs with income data in area code 605, the average median household income is about $72,593 — about 3% below the U.S. median ($75,149).
Average median home value across those ZIPs is about $174,474.
On this page’s income ranking, ZIP 57767 is near the top at about $250,001.
How area code 605 numbering works
In the North American Numbering Plan, the first three digits of a 10-digit phone number are the Numbering Plan Area (NPA), commonly called the area code. Digits 4–6 are the central office code (NXX / “exchange”), and the last four digits identify the individual line.
US5’s 605 page groups ZIP codes that are associated with this NPA in published geography data. That is a place-based view — it is not a live directory of every phone number assigned to 605, and overlays or split NPAs can mean multiple area codes serve the same metro.
Scams and caller ID spoofing
Seeing area code 605 on caller ID does not prove the caller is physically in IA, MN, ND, NE, and SD. Spoofing tools can display almost any NPA, including local-looking numbers used in IRS, bank, warranty, and “grandparent” scams.
If you receive an unexpected call about taxes, arrests, or locked accounts: hang up, do not share codes or remote-access software, and contact the organization using a number from its official website or your statement — not a number the caller provides. US5 publishes geography for research; it does not verify live callers.
ZIP codes in area code 605
Frequently asked questions
Where is area code 605?
Area code 605 is associated with ZIP codes in IA, MN, ND, NE, and SD on US5, covering about 908,625 combined ZIP-area residents across 384 codes. Browse the ZIP table on this page for cities and counties.
How many ZIP codes are in area code 605?
US5 currently lists 384 indexable ZIP codes for area code 605. Counts can change as geography publishes update.
What is the average income in area code 605?
The average of ZIP median household incomes in area code 605 is about $72,593 (about 3% below the U.S. median ($75,149)). Individual neighborhoods vary — sort the ZIP table by income to compare.
What is an NXX or “number block” in area code 605?
After the area code, the next three digits (NXX) identify a central office / exchange “block” of up to 10,000 numbers. US5 focuses on ZIP geography for 605; for live number assignment details, use official NANPA / carrier resources.
Does a 605 caller ID mean the person is local?
No. Caller ID can be spoofed to show area code 605 even when the caller is elsewhere. Treat unexpected calls about money, arrests, or account lockouts as suspicious and verify through official channels.
How can I avoid phone scams that use area code 605?
Do not trust caller ID alone. Never send gift cards, wire money, or install remote-access apps because a caller claims to be from the IRS, a bank, or tech support. Hang up and call back using a published number from a statement or official website.
What cities use area code 605?
Larger population clusters on US5 for 605 include Sioux Falls, SD, Rapid City, SD, Aberdeen, SD, Watertown, SD, and Brookings, SD. Open linked ZIP pages for neighborhood-level demographics.