Le Mars, IA: Population, ZIP Codes & Nearby Cities
Le Mars is a small incorporated city in Plymouth County, Iowa. In the dataset behind this page it has an estimated population of 10,081, sits at 42.781°N, 96.174°W, and observes Central time. Below you will find how it ranks inside Iowa, which ZIP codes it uses, the closest places around it, and how far it is from major US cities.
What are the key facts about Le Mars, IA?
| Place | Le Mars |
|---|---|
| Type | Small incorporated city |
| State | Iowa |
| County | Plymouth County (FIPS 19149) |
| Estimated population | 10,081 |
| Density | 1,119 per sq mi (432 per sq km) |
| Coordinates | 42.7809, -96.1743 |
| Time zone | Central time (UTC−6, America/Chicago) |
| ZIP codes | 1 (51031) |
| Rank in state | 43rd of 1,003 listed places |
| Nearest city over 100,000 | Sioux City, IA (23 mi) |
What is the population of Le Mars, IA?
Le Mars has an estimated population of 10,081. That makes it the 43rd largest of the 1,003 places we list in Iowa, and the largest place in its county. The typical place in Iowa has about 408 residents, so Le Mars is roughly 24.7 times the size of a typical neighbor in the state.
Estimates for places of this size carry wider margins of error than those for big cities, so treat the figure as a guide to scale. Our guide to understanding city population numbers explains why sources disagree.
Places in Iowa with a similar population include Fort Madison (10,321), Pella (10,237), Waverly (10,198), Pleasant Hill (10,019), Carroll (9,833). Comparing these pages is a quick way to see how Le Mars differs from communities of the same scale.
How dense is Le Mars?
Le Mars has about 1,119 people per square mile (432 per square kilometer), which we classify as suburban. Within Iowa, it is denser than about 79% of the listed places. Land at this level is usually a mix of single-family neighborhoods, shopping corridors and parks, where driving is common but destinations are close. Read how to interpret population density to see how we draw these lines.
What ZIP codes does Le Mars use?
Le Mars uses one ZIP code: 51031. A single code usually means a compact delivery area, but the same code may also serve addresses just outside the town line. Codes beginning with 5 are assigned to the Upper Midwest and northern Plains (Iowa, Minnesota, Montana, the Dakotas and Wisconsin). Learn more in our guide to how ZIP codes work or check any code with the ZIP code lookup.
What time zone is Le Mars in?
Le Mars is in the Central time zone, which is UTC−6 from Coordinated Universal Time in standard time (IANA zone America/Chicago). The area observes daylight saving time, so clocks move forward in March and back in November. The nearest listed place in a different time zone is Alliance, NE, about 345 miles away, which gives a sense of how far the nearest zone boundary may be. Current local time: see the Central time hub. For the rules behind these zones, read US time zones explained.
Where is Le Mars located in Iowa?
Le Mars lies in the northwestern part of Iowa, at 42.781° north latitude and 96.174° west longitude. The state capital, Des Moines, is about 156 miles to the southeast. The closest listed place in another state is South Sioux City, NE, roughly 25 miles to the southwest, which shows how near Le Mars is to a state line. For big-city services, the nearest place with more than 100,000 people is Sioux City, IA, 23 miles to the southwest.
Which cities are near Le Mars, IA?
The closest listed place to Le Mars is Orange City, IA, 16.4 miles to the north. Of the eight nearest places below, 0 are in the same county. Distances are straight-line (great-circle) miles measured between place centers; see how distance is calculated.
| Place | Distance | Direction | Population |
|---|---|---|---|
| Orange City | 16.4 mi | North | 7,044 |
| Sioux Center | 20.3 mi | North | 7,605 |
| Sioux City | 22.5 mi | Southwest | 106,455 |
| South Sioux City, NE | 25.1 mi | Southwest | 12,809 |
| Sergeant Bluff | 28.0 mi | South | 5,127 |
| Sheldon | 32.2 mi | Northeast | 5,082 |
| Vermillion, SD | 38.1 mi | West | 10,926 |
| Storm Lake | 50.5 mi | East | 11,066 |
Which county is Le Mars in?
Le Mars is in Plymouth County, which has the Federal Information Processing Standards (FIPS) code 19149. The county contains 11 places in our data, 1 of which have their own page here and 10 smaller communities that appear only in county and state lists. Other places in the county include Remsen (1,617), Akron (1,463), Kingsley (1,402), Hinton (948), Merrill (731). Codes like this one help separate places that share a name; see the guide to counties and FIPS codes.
How far is Le Mars from major US cities?
Among six major hubs, Le Mars is closest to Chicago, IL at about 438 miles and farthest from Los Angeles, CA at about 1,338 miles in a straight line. Road distances are usually 10 to 30 percent longer. Try the distance calculator for any other pair.
| Major city | Straight-line distance | Direction |
|---|---|---|
| New York, NY | 1,153 mi | East |
| Los Angeles, CA | 1,338 mi | West |
| Chicago, IL | 438 mi | East |
| Houston, TX | 899 mi | South |
| Atlanta, GA | 890 mi | Southeast |
| Denver, CO | 497 mi | West |
Are there other places called Le Mars?
No. In our data, Le Mars in Plymouth County, Iowa is the only place with this name, so the name alone is enough to identify it, though adding the state is still good practice in addresses and forms.
Planning a move to Le Mars?
If you are weighing Le Mars, start with the practical numbers: how far it is from where you live, whether it changes your time zone, and how its size and density compare with your current city. Use the distance calculator to measure the trip from where you live. The radius search tool lists every place within any distance of it. Our checklist for comparing cities explains what to check next.
Where to go next
Population and density come from a compiled dataset and are estimates. They may differ from official Census Bureau counts. Verify important figures at census.gov.