Riverdale is a city in McLean County, North Dakota, United States. The population was 223 at the 2020 census. Riverdale was the largest of the construction camps that sprang up in 1946 to house workers building the Garrison Dam just to the west. After the dam was completed in 1953, residents of the other camps (including Dakota City and Big Bend) who decided to stay on relocated to Riverdale. It was operated by the federal government from its establishment until 1986, when it was turned over to the state of North Dakota with incorporation following shortly thereafter.

Official town website ↗

From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)

Town numbers

ZIP code58565

Area code701

Living in Riverdale

Housing in Riverdale

$227K▲ 16.2% in a year Typical home value · Zillow

The typical Riverdale home is worth about $227,000, up 16.2% in a year, 22% below the North Dakota typical home.

Zillow Home Value Index · Redfin Data CenterHousing market →

Work & commute in Riverdale

Full picture →

Most working residents leave Riverdale for work: only 0% work in town. The top destinations are Bismarck (29%), Underwood (6%) and Washburn (6%). Half commute less than 53 miles.

Bismarck

29%

Underwood

Washburn

Wilton

0%Work in townlive and work in Riverdale 53 miWhere do people commute?the commute map 58Jobs based herea commuter town

Census LEHD 2023 · ACSWork & commute in Riverdale →

Health in Riverdale

Compared with North Dakota

10better than ND·8worse

of 32 measures CDC estimates. The other 14 are too close to call.

Conditions 8▼ 4 close Habits 1▲ 3 close Care 4▲ 3 close Mind 1▲ 4 close Everyday needs 4▲ 0 close

BetterToo close to callWorse

What stands out

6.2%Fewer adults facing housing insecurityND 8.9% · better 4.1%Fewer adults facing a utility shut-offND 5.8% · better 12.9%More adults who have had cancerND 8.2% · worse

Care nearby

Garrison Memorial HospitalGarrison · 10.7 mi · ER · rural critical access

Ccchc Hazen ClinicHazen · 17.8 mi · sliding-scale fees

Primary careNo shortage

DentalShortage · county-wide

Mental healthShortage · county-wide

CDC PLACES 2025 · modeled estimates for adults · CDC's estimate for Riverdale · CMS · HRSAHealth in Riverdale →

Natural hazards in Riverdale

Low

Expected storm and flood damage is higher than in 36% of U.S. communities.

🥶 Cold waves🌊 Inland flooding🧊 Hail

0Does Riverdale flood?no paid flood claims on record 1Disasters that paid out herefederal disaster sent FEMA money to Riverdale

FEMA National Risk Index December 2025 · OpenFEMANatural hazards in Riverdale →

Climate in Riverdale

Full climate →

Riverdale has cold, snowy winters and pleasant summers, with very little rain. A typical July afternoon reaches 82°, a January night drops to 3°, and about 43 inches of snow falls in a normal winter.

24° / 6°Winter

53° / 30°Spring

80° / 55°Summer

55° / 33°Fall