State Abbreviation Guide

What Is the Abbreviation for Indiana?

The standard 2-letter abbreviation for Indiana is IN.

State Abbreviation
IN
Traditional Form
Ind.
Capital
Indianapolis
Region
Midwest

Indiana Abbreviation

Indiana's abbreviation is IN. You may also see Ind. in older writing, but IN is the form used in mailing addresses, forms, databases, and current style guides.

2-letter postal code
IN
Traditional / AP style
Ind.
Address format
Indianapolis, IN
Takes periods?
No — write IN, not IN.

Indiana Abbreviation for Mailing and Forms

Use IN for Indiana in mailing addresses, shipping labels, official forms, and database entries.

Mailing addresses
Shipping labels
Online checkout forms
Tax documents
Spreadsheets & databases
Government & school records

In all of these contexts write IN in uppercase. The form IN. with a period is incorrect for postal use.

AP Style and Traditional Indiana Abbreviation

Postal & forms IN Mailing addresses, shipping labels, online forms, and all data entry.
AP Style & editorial Ind. Newspapers, news releases, and most editorial style guides when a city name comes first.

What Does IN Stand For?

Indiana's USPS abbreviation is IN.

IN became the standard postal abbreviation for Indiana in 1963. The older form Ind. still appears in older writing, but IN is the form used in current addresses and forms.

How to Write an Indiana Address

In a U.S. mailing address, write the city name, then IN in uppercase, then the five-digit ZIP Code. Never put a period after the abbreviation.

John Smith 123 Main St Indianapolis, IN ZIP

The same format applies in checkout forms, school worksheets, CRM systems, spreadsheets, shipping labels, and government databases — anywhere a two-letter state code is required.

Related Abbreviation Questions

These states share a first letter, region, or alphabetical position with Indiana and are commonly looked up alongside it.

What is the abbreviation for Idaho? Idaho's abbreviation is ID. What is the abbreviation for Illinois? Illinois's abbreviation is IL. What is the abbreviation for Iowa? Iowa's abbreviation is IA. What is the abbreviation for Kansas? Kansas's abbreviation is KS. What is the abbreviation for Michigan? Michigan's abbreviation is MI.

FAQ

What is the abbreviation for Indiana?

The standard USPS abbreviation for Indiana is IN.

What is the postal abbreviation for Indiana?

IN is the two-letter postal abbreviation for Indiana. It is the form used in mailing addresses, shipping labels, forms, and databases.

How do you abbreviate Indiana?

Abbreviate Indiana as IN in current USPS, mailing, and database use.

What is the two-letter abbreviation for Indiana?

IN is the official two-letter abbreviation for Indiana.

What is the Indiana state code?

IN is the two-letter state code used for Indiana in mailing addresses, forms, spreadsheets, and databases.

Why is Indiana abbreviated IN?

Indiana's USPS abbreviation is IN.

What does IN stand for?

IN stands for Indiana in the USPS state abbreviation system.

What is the old abbreviation for Indiana?

Older editorial styles often wrote Indiana as Ind.. For mailing and database use, the modern standard is IN.

How do you write an Indiana mailing address?

Use the city name, then the two-letter postal code IN, then the ZIP Code. For example: Indianapolis, IN 00000.

What state is IN?

IN is the postal abbreviation for Indiana, located in the Midwest region. The capital is Indianapolis.