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File No.
GR-DOSSIER-19153
Active File
Confidence: Public
Resilience Dossier

Polk CountyIowa · IA

49
/ 100fair
Composite scale0 ─ 100
49
CriticalExcellent
State rank
#99IA
National rank
#2,361/ 3,436
Population
492,316332.2/km²
FIPS 19153│AREA 1,482 km²│LAT 41.6848 · LON -93.5690
§01

Geospatial

41.68°N, 93.57°W
Map of Polk County, IA
Target ▸ Polk County
N│Mapbox dark-v11
§02

Analyst Brief

Voice ▸ Stratfor

▌Polk County is a county in Iowa, with a population of 492,316, covering 1,482 square kilometers. Population density is 332.2 people per square kilometer. On the Scout composite resilience index, Polk County scores 49 out of 100, ranked #99 in IA and #2,361 of 3,436 regions. The five-year average temperature anomaly versus the 20th-century baseline is 2.1 degrees Fahrenheit. Counties above 2.6 degrees fall inside the climate tipping-point band. The FEMA National Risk Index composite hazard score is 92 out of 100. Annual precipitation averages 35.8 inches. Net IRS migration in the most recent tax year was -2.3 per 1,000 residents. USDA classifies the county as Rural-Urban Continuum Code 2 (1 = metropolitan core, 9 = completely rural).

§03

Assessment Matrix

6 Dimensions
D-0123

Climate Stability

Natural hazard exposure, temperature anomaly vs. 20th-century baseline, drought, wildfire, and flood risk.

D-0243

Water & Food

Groundwater reliability, precipitation normals, growing season length, and cropland availability.

D-0359

Social Stability

Net migration, social vulnerability, and crime rates.

D-0464

Infrastructure

Solar energy potential, off-grid power viability, and proximity to nuclear facilities.

D-0562

Self-Sufficiency

Rural-urban classification, agricultural diversity, and land availability.

D-0663

Affordability

Median home value and rental costs relative to the national range. Lower cost counties score higher.

§04

Source Telemetry

14 Inputs
S-01Climate
FEMA NRI hazard score
91.54 /100
Temperature anomaly
2.07 °F
S-02Water
Annual precipitation
35.8 in
Soil saturation depth
3.2 ft
Growing season
181 days
S-03Social
Net migration
-2.3 /1k
Social vulnerability
0.448 /1
Crime index
8.3 /100
S-04Infrastructure
Solar irradiance
4.1 kWh/m²/d
Distance to nuclear facility
141.5 mi
S-05Self-Sufficiency
Cropland share
44.0 %
Rural-urban code
2 /9
S-06Affordability
Median home value
$232,000
Median rent
$1,060 /mo

Inputs marked “— —” are pending pipeline integration and currently use neutral defaults in the composite. They do not skew rankings.

§05

Cross-Reference

REF-A

Polk County on the Scout map

See this county in spatial context. Compare with neighbors. Tune the composite weights to your priorities.

REF-B

Top counties in Iowa

State rollup ranking the highest- and lowest-scoring counties for resilience by composite Scout score.

§06

Citations

Full methodology ▸
  • FEMA-NRIFEMA National Risk Index, county composite hazard score
  • NOAA-TMPNOAA nClimDiv county temperature anomaly, 2020-2024 vs. 1901-2000 baseline
  • NOAA-PCPNOAA county precipitation normals, 1991-2020
  • IRS-MIGIRS county-to-county migration, tax year 2021-2022
  • CDC-SVICDC Social Vulnerability Index, 2022 release (RPL_THEMES)
  • USDA-RUCCUSDA Economic Research Service Rural-Urban Continuum Codes, 2023
  • NASA-PWRNASA POWER climatology, annual global horizontal irradiance (kWh/m²/day)
  • USDA-NASSUSDA NASS Census of Agriculture 2022, county cropland and total land area
  • USDA-SDMUSDA NRCS Soil Data Mart, average seasonal soil saturation depth (cm)
  • ACS-2022U.S. Census Bureau ACS 5-Year Estimates 2022, median home value and gross rent