Mapping Illinois’ Hard to Count (HTC) Communities for a Fair and Accurate 2020 Census

Welcome to the 2020 Census Illinois Hard to Count Index map site.

An accurate count of Illinois' population is essential to ensure that Illinois receives the funding it needs to adequately and effectively care for its residents and to provide critical services and programs. The State of Illinois’ Census Office is supporting a statewide census outreach and education effort to reach the highest self-response rate possible. The State's strategies will prioritize HTC communities, and encourage all Illinois residents to participate in the 2020 Census.

Census 2020 Response Rates: This map shows by county the self-response rates of residents. The higher the self-response rate the lower the cost to taxpayers in conducting follow-up to ensure everyone is counted. The data is updated daily. Residents have until the end of October to respond, although Census takers will commence knocking on doors to those who have not responded starting August 11th. You are able to see the response rates by County, City or Census Tract..

ACS 2017 Response Rates: This map is like the 2010 Census Response Rates map. The American Community Survey (ACS) is conducted year-round so the information is more current on those areas that are not responding to the Census Bureau as neighborhoods could have changed since 2010.

Census 2010 Response Rates: This map shows the areas where there were high levels of non-response to the 2010 Census. There may be similar patterns in 2020. The non-response was to initial mailings of the form requiring the Census Bureau to visit these areas to finish completing the Census. The goal is to obtain as high of a response as possible.

Census Contact Strategy: About 95 percent of housing units will receive their census invitations in the mail. The U.S. Census Bureau will send up to five mailings, to encourage you to respond online, by mail, or by phone. Most areas of the country are likely to respond online, so most housing units will first receive a letter asking you to go online to complete the census questionnaire (these Internet First areas are shown in Purple on the map). Areas that are less likely to respond online will receive a paper questionnaire along with their first invitation, and this will include information about how to respond online or by phone (these Internet Choice areas are shown in Green). Some areas will receive invitations in bilingual Spanish and English (darker shades), while most areas will receive invitations in English (lighter shades) .The Yellow regions receive hand delivered packets due to there not being an address per household such as rural routes or recreational areas that have a centralized mail repository.