Marion, IA GIS Map

Marion is a city in Linn County, Iowa, with a population of about 40,605. The map below shows its location, boundary and surrounding roads, with federal GIS layers you can turn on for the area.

County: Linn County
Population: 40,605
Elevation: 849 ft
Coordinates: 42.0341, -91.5976
ZIP code: 52302
Land area: 18 sq mi
Time zone: America/Chicago

About Marion, IA

Marion is a city in Linn County, Iowa, with a population of about 40,605. It is the 14th most populous of the 44 Iowa cities listed on GIS Map.

Cities Near Marion

Other Cities in Linn County

Cedar Rapids

GIS Data for Marion, IA

The Marion map loads live federal GIS layers in your browser, so you can check flood zones, terrain, land cover and district boundaries for any address in Marion without a separate GIS login. Everything below is drawn from public U.S. government data.

Layers you can turn on

FEMA flood zones
National Flood Hazard Layer — flood insurance rate map zones.
Elevation contours and hillshade
USGS 3DEP terrain, so you can read slope and relief.
Land cover
NLCD land cover classes — forest, developed, wetland, water.
School districts
Census TIGER unified and elementary school district boundaries.
ZIP code and county boundaries
Census TIGER ZCTA and county boundary lines.

Map tools

Measure distance and area
Draw a line or polygon to get length in miles or area in acres.
Sketch and annotate
Add points, lines and shapes on top of the map.
Inspect any point
Click the map to read coordinates, elevation and the layers under your cursor.
Download the map
Save the current view as a PNG image.

Marion Demographics

Source: U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates.

Population

41,896

Households

16,915

Median household income

$86,743

Median age

40.6 years

Median home value

$241,700

Median gross rent

$961/mo

Owner-occupied homes

77.4%

Bachelor's degree or higher

38.1%

Below poverty level

8.1%

Land area

18 sq mi

Population density

2,327 / sq mi

County

Linn County

ZIP codes in Marion

52302

Marion Population Growth

Source: U.S. Census Bureau, 2010 Census and Population Estimates Program (Vintage 2024: April 2020 estimates base and July 1, 2024 estimate).

2010 Census

34,768

April 2020 (estimates base)

41,552

July 2024 estimate

42,542

Change 2010-2020

+19.5%

Change 2020-2024

+2.4%

Photos of Marion

Hover over a photo to see it larger. Tap on mobile.

Photos from Wikimedia Commons, taken in or near Marion. Credits and licenses are shown in the larger view.

Federal Buildings & Leases in Marion

GSA-managed federal properties in and around Marion.

Total properties

Government-owned

Leased

Rentable sq ft

6,373

Property	Address	Status	Sq ft	Lease ends
1075 Industrial Ave	1075 Industrial Ave, 52233	Leased	6,373	Aug 2037

Source: U.S. GSA Inventory of Owned and Leased Properties (data.gov), September 2026.

Soils of Marion

General soil map unit at the city center: Tama-Maxfield-Klinger-Dinsdale

Soil Properties

Drainage class: Well drained
Hydrologic soil group: B (moderate infiltration)
Available water storage (0–150 cm): 29.1 cm
Typical slope: 4%
Flooding frequency: None
Min. annual water table depth: 46 cm

Soil Components

Dinsdale21%
Mollisols · Typic Argiudolls
Klinger18%
Mollisols · Aquic Hapludolls
Maxfield16%
Mollisols · Typic Endoaquolls
Tama8%
Mollisols · Typic Argiudolls
Franklin7%
Alfisols · Udollic Endoaqualfs
Kenyon4%
Mollisols · Typic Hapludolls

Source: USDA NRCS U.S. General Soil Map (STATSGO2). General soil map data (1:250,000 scale) is not suitable for site-specific decisions.

Climate of Marion

30-year averages (1991–2020) from the Cedar Rapids #1, Ia weather station, elevation 813 ft, 1.2 miles from the city center.

Warmest month

Jul · avg high 86°F

Coldest month

Jan · avg low 12°F

Annual precipitation

38.8 in

Annual snowfall

34.3 in

Average Monthly Temperatures (°F)

30°12°

35°17°

49°28°

63°38°

74°50°

82°60°

86°63°

83°61°

77°53°

64°42°

48°29°

35°19°

JanFebMarAprMayJunJulAugSepOctNovDec

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high °F	30	35	49	63	74	82	86	83	77	64	48	35
Avg low °F	12	17	28	38	50	60	63	61	53	42	29	19
Precip. in	1.17	1.34	2.06	4.02	4.74	5.68	4.47	4.42	3.96	3.00	2.22	1.67
Snow in	8.7	8.3	4.0	1.5	0.0	0.0	0.0	0.0	0.0	0.6	2.2	9.0

Source: NOAA NCEI U.S. Climate Normals, 1991–2020. Conditions at the station may differ from other parts of the city.

Natural Hazard Risk in Marion

FEMA National Risk Index ratings for Linn County, compared with all U.S. counties.

Overall risk

Relatively Moderate

Score 86.7 of 100

Expected annual loss

$79,106,363

Buildings, population & agriculture

Social vulnerability

Very Low

Susceptibility to hazard impacts

Community resilience

Very High

Ability to prepare & recover

Risk by Hazard

Strong WindVery High
HailRelatively High
TornadoRelatively High
Winter WeatherRelatively High
DroughtRelatively Moderate
Inland FloodingRelatively Moderate
Ice StormRelatively High
LightningRelatively High
Cold WaveRelatively Moderate
Heat WaveRelatively Low
LandslideRelatively Low
EarthquakeVery Low
WildfireVery Low
HurricaneVery Low

Source: FEMA National Risk Index (December 2025 release). County-level ratings are relative to other U.S. counties and are not a property-specific assessment.

Marion FAQ

What county is Marion in?

Marion, Iowa is located in Linn County.

What is the population of Marion?

Marion has a population of about 40,605, making it the number 14 of the 44 Iowa cities listed on GIS Map.

What is the elevation of Marion?

The elevation of Marion is approximately 849 feet (259 meters) above sea level at the city center.

What ZIP codes are in Marion?

The ZIP code for Marion is 52302.

What time zone is Marion in?

Marion is in the Central Time zone (America/Chicago).

How far is Marion from Des Moines?

Marion is about 109 miles from Des Moines, the capital of Iowa, in a straight line.

What cities are near Marion?

Cities near Marion include Cedar Rapids, IA (5 miles); North Liberty, IA (20 miles); Coralville, IA (25 miles); Iowa City, IA (26 miles); Waterloo, IA (50 miles).

Local notes for Marion, IA

Questions and local knowledge from people who know the area. Every note is read before it appears here.

Latest Marion News

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