Mammography Gap Explorer
Illinois · County screening

Where does mammography use appear lower?

Explore modeled county-level mammography estimates across Illinois. Select a county to see its estimate and uncertainty.

State Cancer Profiles · women ages 50–74 · 2021–2023. This is a different age range from the main Illinois analysis of women ages 40–74, so the county map is a related geographic indicator—not a geographic allocation of the statewide overdue estimate.
County map

Illinois screening estimates

Darker teal indicates a higher modeled percentage reporting a mammogram within the past two years.

Loading Illinois county boundaries…
<70% 70–<75% 75–<80% 80–<85% 85%+
Screening estimates and 95% confidence intervals: State Cancer Profiles, National Cancer Institute + CDC ↗. The earlier prototype loaded us-atlas 3.0.1; this packaged version uses a local Census-derived county geometry asset so the map remains available without that live dependency.
Full county data

Illinois county estimates

The same values behind the map are available as ordinary text so the evidence remains accessible without interpreting map color.

CountyModeled estimate95% confidence interval
Adams County83.1%71.8–92.7%
Alexander County79.0%59.8–94.2%
Bond County79.7%60.6–94.3%
Boone County83.2%66.8–95.8%
Brown County77.2%57.3–92.9%
Bureau County77.3%59.3–92.1%
Calhoun County81.7%63.5–95.5%
Carroll County80.4%64.0–93.7%
Cass County76.8%57.0–92.7%
Champaign County80.8%70.0–89.9%
Christian County80.9%64.5–94.1%
Clark County81.5%64.7–94.8%
Clay County82.7%64.4–96.1%
Clinton County84.4%68.8–96.0%
Coles County77.0%58.7–92.3%
Cook County81.9%75.9–87.4%
Crawford County78.7%60.9–93.0%
Cumberland County84.3%67.6–96.5%
De Witt County80.2%61.6–94.7%
DeKalb County89.9%77.5–98.5%
Douglas County78.4%59.4–93.5%
DuPage County81.7%75.1–87.8%
Edgar County79.1%61.0–93.3%
Edwards County79.6%60.9–94.3%
Effingham County81.2%62.8–95.2%
Fayette County71.2%52.2–87.7%
Ford County79.4%60.2–94.3%
Franklin County74.5%56.0–90.1%
Fulton County70.2%50.8–87.2%
Gallatin County81.3%62.9–95.3%
Greene County80.1%61.4–94.7%
Grundy County66.4%47.9–83.2%
Hamilton County80.0%61.2–94.5%
Hancock County75.2%56.5–90.8%
Hardin County79.5%60.7–94.2%
Henderson County80.7%61.8–95.1%
Henry County76.8%60.6–90.6%
Iroquois County78.0%58.6–93.4%
Jackson County82.6%66.6–95.2%
Jasper County80.9%62.1–94.9%
Jefferson County82.1%64.2–95.5%
Jersey County78.3%60.8–92.5%
Jo Daviess County76.9%57.4–92.5%
Johnson County67.3%46.8–85.4%
Kane County73.5%62.2–83.9%
Kankakee County80.6%64.8–93.4%
Kendall County71.6%53.3–87.4%
Knox County75.0%56.1–90.7%
La Salle County82.0%67.0–94.3%
Lake County77.1%65.3–87.7%
Lawrence County67.5%47.1–85.5%
Lee County78.3%59.2–93.5%
Livingston County78.8%59.6–93.8%
Logan County83.8%66.9–96.2%
Macon County76.5%58.4–91.6%
Macoupin County84.1%68.6–96.0%
Madison County73.0%59.4–85.0%
Marion County82.1%64.2–95.6%
Marshall County81.7%63.7–95.3%
Mason County76.9%58.4–92.0%
Massac County82.8%65.7–95.7%
McDonough County81.6%67.8–93.0%
McHenry County80.4%68.4–90.9%
McLean County73.7%54.8–89.8%
Menard County84.3%67.0–96.6%
Mercer County75.4%55.6–91.6%
Monroe County70.6%51.3–87.4%
Montgomery County79.4%62.0–93.4%
Morgan County83.0%65.6–96.0%
Moultrie County76.9%57.5–92.5%
Ogle County80.5%64.0–93.7%
Peoria County84.0%69.9–95.5%
Perry County77.5%58.0–93.2%
Piatt County82.4%64.4–95.8%
Pike County80.6%61.9–94.9%
Pope County78.7%59.5–93.8%
Pulaski County79.4%60.4–94.2%
Putnam County79.4%60.3–94.3%
Randolph County80.9%62.9–94.9%
Richland County76.0%57.1–91.5%
Rock Island County72.0%58.0–84.8%
Saline County80.7%61.9–95.1%
Sangamon County76.0%63.1–87.1%
Schuyler County71.2%51.0–88.5%
Scott County81.3%63.0–95.4%
Shelby County88.0%74.0–98.1%
St. Clair County82.4%72.2–91.0%
Stark County80.2%61.5–94.7%
Stephenson County79.7%62.6–93.5%
Tazewell County78.8%64.4–91.0%
Union County79.4%60.6–94.2%
Vermilion County82.6%72.4–91.4%
Wabash County79.6%60.7–94.3%
Warren County78.1%58.7–93.4%
Washington County81.5%63.2–95.3%
Wayne County79.7%60.9–94.3%
White County80.1%61.2–94.6%
Whiteside County74.2%56.1–89.9%
Will County70.2%56.1–83.1%
Williamson County81.1%62.6–95.2%
Winnebago County77.2%60.8–91.2%
Woodford County88.0%73.0–98.1%

What the map measures

Modeled county percentages for women ages 50–74 reporting a mammogram within the past two years, covering 2021–2023.

How counties are joined

County estimates are matched to county polygons using Federal Information Processing Standards (FIPS) codes. The map changes the presentation, not the underlying screening estimates.

Why the denominator matters

The county source uses ages 50–74, while the main Illinois screening-gap pages use ages 40–74. The two views should not be treated as one directly decomposable dataset.

Source and independence notice. State Cancer Profiles is produced by the National Cancer Institute in collaboration with CDC. This independent visualization is not affiliated with or endorsed by CDC, the National Cancer Institute, the National Institutes of Health, the Department of Health and Human Services, or the U.S. Government. The source data are available free of charge at the linked federal website.