ZCTAs are approximate area representations of U.S. Postal Service (USPS) 5-digit ZIP Code service areas that the Census Bureau creates using census blocks to present statistical data from censuses and surveys. The Census Bureau defines ZCTAs by allocating each block that contains addresses to a single ZIP Code tabulation area, usually to the ZCTA that reflects the most frequently occurring ZIP Code for the addresses within that block. Blocks that do not contain addresses but that are completely surrounded by a single ZIP Code tabulation area (enclaves) are assigned to the surrounding ZCTA; those surrounded by multiple ZCTAs will be added to a single ZCTA based on the longest shared border. The Census Bureau identifies ZCTAs using a 5-character code that represents the most frequently occurring USPS ZIP Code within that ZCTA. This code may contain leading zeros. Users should not use ZCTAs to identify the official USPS ZIP Code for mail delivery. The USPS makes periodic changes to ZIP Codes to support more efficient mail delivery. ZIP Codes that cover primarily nonresidential or post office box addresses may not have a corresponding ZCTA because the delineation process uses primarily residential addresses, resulting in a bias towards ZIP Codes used for city-style mail delivery.

Polygon file representing the ZIP code boundaries in Indianapolis and Marion County, Indiana.Data projection: NAD 1983 StatePlane Indiana East FIPS 1301 (US Feet)

A dataset showing the population of 46227 between 2010 and 2020.

A dataset showing the population of 46143 between 2010 and 2020.

Polygon file representing the nine township boundaries in Marion County, Indiana.Data projection: NAD 1983 StatePlane Indiana East FIPS 1301 (US Feet)

Tabular data representing library and library branch locations was downloaded from the Indiana State Library (https://www.in.gov/library/directory-of-indiana-libraries/pldirectory/). Two spreadsheets were downloaded from this site, PL-Mailing-Addresses.xls, and PL-Branch-Directory.xls. Each spreadsheet was separately geocoded by IGIO staff, and any unmatched addresses were manually placed. Both datasets were then combined using the "Merge" tool in ArcGIS Pro before publishing. Attributes include the library name, branch name (when applicable), full address (address, city, state, and ZIP code), street address, mailing address (when applicable), city, state, ZIP code, library director name, and date updated by the State Library.This layer's default symbology is the same symbol with a different size and color for libraries versus branches. Library locations are larger (12 pt size) and blue, and branches are smaller (10 pt size) and purple.

A dataset listing Indiana cities by population for 2024.