Decatur, IN: Population, ZIP Codes & Nearby Cities

Looking for facts about Decatur? It is a small incorporated city in Adams County, Indiana, with an estimated 10,943 people according to our dataset. It lies at 40.829°N, 84.928°W in Eastern time. The sections below cover its size, ZIP codes, neighbors and distances.

What are the key facts about Decatur, IN?

What is the population of Decatur, IN?

Decatur has an estimated population of 10,943. That makes it the 81st largest of the 677 places we list in Indiana, and the largest place in its county. The typical place in Indiana has about 984 residents, so Decatur is roughly 11.1 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 Indiana with a similar population include Angola (11,352), North Vernon (11,310), Yorktown (11,111), Greencastle (10,567), Lowell (10,541). Comparing these pages is a quick way to see how Decatur differs from communities of the same scale.

How dense is Decatur?

Decatur has about 1,634 people per square mile (631 per square kilometer), which we classify as suburban. Within Indiana, it is denser than about 69% 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 Decatur use?

Decatur uses one ZIP code: 46733. 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 4 are assigned to the Great Lakes and Ohio Valley (Indiana, Kentucky, Michigan and Ohio). Learn more in our guide to how ZIP codes work or check any code with the ZIP code lookup.

What time zone is Decatur in?

Decatur is in the Eastern time zone, which is UTC−5 from Coordinated Universal Time in standard time (IANA zone America/Indiana/Indianapolis). 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 La Porte, IN, about 107 miles away, which gives a sense of how far the nearest zone boundary may be. Current local time: see the Eastern time hub. For the rules behind these zones, read US time zones explained.

Where is Decatur located in Indiana?

Decatur lies in the northeastern part of Indiana, at 40.829° north latitude and 84.928° west longitude. The state capital, Indianapolis, is about 97 miles to the southwest. The closest listed place in another state is Van Wert, OH, roughly 18 miles to the east, which shows how near Decatur is to a state line. For big-city services, the nearest place with more than 100,000 people is Fort Wayne, IN, 21 miles to the northwest.

Which cities are near Decatur, IN?

The closest listed place to Decatur is Berne, IN, 11.9 miles to the south. Of the eight nearest places below, 1 is in the same county. Distances are straight-line (great-circle) miles measured between place centers; see how distance is calculated.

Which county is Decatur in?

Decatur is in Adams County, which has the Federal Information Processing Standards (FIPS) code 18001. The county contains 4 places in our data, 2 of which have their own page here and 2 smaller communities that appear only in county and state lists. Other places in the county include Berne (5,830), Geneva (1,359), Monroe (883). Codes like this one help separate places that share a name; see the guide to counties and FIPS codes.

How far is Decatur from major US cities?

Among six major hubs, Decatur is closest to Chicago, IL at about 159 miles and farthest from Los Angeles, CA at about 1,881 miles in a straight line. Road distances are usually 10 to 30 percent longer. Try the distance calculator for any other pair.

Are there other places called Decatur?

Yes. Our data lists 9 other places named Decatur: Decatur, IL (87,236), Decatur, AL (68,867), Decatur, GA (25,696), Decatur, TX (7,094), Decatur, AR (1,790), Decatur, MI (1,732), Decatur, MS (1,705), Decatur, TN (1,667), and 1 more. When you search for Decatur, add the state or county so you land on the right one. This page covers the Decatur in Adams County, Indiana.

Planning a move to Decatur?

If you are weighing Decatur, 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.