Prevention

Colorectal Cancer Screening by County — US Rankings

CDC PLACES 2023 · Age-adjusted prevalence · All 3,144 US counties

PLACES tracks the share of adults aged 45-75 who report being up-to-date with colorectal cancer screening per USPSTF guidelines. The age window changed from 50-75 to 45-75 in 2021 — current PLACES estimates reflect the broader window. Colorectal screening is the prevention measure with the strongest evidence base for mortality reduction in adult-onset cancers, and county-level uptake remains uneven. The screening rate correlates with insurance coverage, time off work, and the share of residents with a regular primary-care provider.

How this ranking is built

Source: CDC PLACES 2023 release. Methodology: BRFSS survey responses pooled across years, fitted with a small-area statistical model, age-adjusted to the 2000 US standard population. Confidence intervals (95%) are shown for each county — wider intervals indicate more uncertainty in the modeled estimate, typically driven by smaller populations.

Highest Colorectal Cancer Screening Rates — Top 100 Counties

Counties with the highest reported colorectal cancer screening rates — these counties lead the nation on this measure.

#	County	Rate	95% CI	State
1	Washington County	71.1%	67.2 – 75.0	Rhode Island
2	Kent County	70.3%	66.3 – 74.1	Rhode Island
3	Newport County	70.2%	65.9 – 74.4	Rhode Island
4	Bristol County	70.0%	65.6 – 74.0	Rhode Island
5	Charleston County	69.0%	65.1 – 72.7	South Carolina
6	Cumberland County	68.5%	65.1 – 71.8	Maine
7	Saratoga County	68.3%	64.2 – 72.3	New York
8	Tompkins County	68.0%	63.3 – 72.6	New York
9	Putnam County	67.7%	62.9 – 72.1	New York
10	Leelanau County	67.6%	63.0 – 72.4	Michigan
11	Goochland County	67.5%	62.4 – 72.4	Virginia
12	Fauquier County	67.4%	62.9 – 71.8	Virginia
13	Lower Connecticut River Valley Planning Region	67.4%	64.3 – 70.5	Connecticut
14	Falls Church city	67.3%	62.3 – 72.0	Virginia
15	Scott County	67.2%	63.0 – 71.3	Minnesota
16	St. Johns County	67.2%	62.6 – 71.6	Florida
17	Jefferson County	67.2%	63.4 – 71.1	Alabama
18	Richland County	67.1%	63.0 – 71.0	South Carolina
19	Delaware County	67.1%	63.5 – 70.7	Ohio
20	Clinton County	67.1%	61.9 – 71.5	Michigan
21	York County	67.0%	62.3 – 71.6	Virginia
22	Chester County	67.0%	62.0 – 71.5	Pennsylvania
23	Johnson County	67.0%	62.4 – 71.1	Indiana
24	Western Connecticut Planning Region	67.0%	64.1 – 69.7	Connecticut
25	Cumberland County	66.8%	61.6 – 71.5	Pennsylvania
26	South Central Connecticut Planning Region	66.8%	63.2 – 70.3	Connecticut
27	Arlington County	66.7%	62.2 – 70.9	Virginia
28	Grand Traverse County	66.7%	62.1 – 71.2	Michigan
29	Barnstable County	66.7%	62.4 – 71.0	Massachusetts
30	Stafford County	66.6%	62.3 – 71.1	Virginia
31	New Kent County	66.6%	61.6 – 71.5	Virginia
32	Livingston County	66.6%	62.1 – 71.0	Michigan
33	St. Mary's County	66.6%	62.8 – 70.4	Maryland
34	Brown County	66.5%	62.2 – 70.7	Wisconsin
35	James City County	66.5%	61.6 – 71.1	Virginia
36	Grand Isle County	66.5%	61.2 – 71.3	Vermont
37	Berkeley County	66.5%	62.1 – 70.9	South Carolina
38	Ottawa County	66.5%	61.9 – 70.9	Michigan
39	Dane County	66.4%	62.6 – 70.1	Wisconsin
40	Wood County	66.4%	61.8 – 70.8	West Virginia
41	Hancock County	66.4%	61.5 – 71.0	West Virginia
42	Georgetown County	66.4%	62.1 – 70.9	South Carolina
43	Wright County	66.4%	62.1 – 70.5	Minnesota
44	Plymouth County	66.4%	62.5 – 69.9	Massachusetts
45	Black Hawk County	66.4%	62.7 – 69.9	Iowa
46	Carver County	66.3%	61.8 – 70.6	Minnesota
47	Talbot County	66.3%	62.0 – 70.3	Maryland
48	Capitol Planning Region	66.3%	63.5 – 69.0	Connecticut
49	Waukesha County	66.2%	62.5 – 69.8	Wisconsin
50	Middlesex County	66.2%	63.8 – 69.6	Virginia
51	Hancock County	66.2%	61.7 – 70.5	Indiana
52	Hanover County	66.1%	61.4 – 70.6	Virginia
53	Albemarle County	66.1%	61.5 – 70.2	Virginia
54	Providence County	66.1%	62.3 – 69.9	Rhode Island
55	Orange County	66.1%	61.4 – 70.7	North Carolina
56	Kent County	66.1%	61.9 – 70.3	Michigan
57	Southeastern Connecticut Planning Region	66.1%	62.8 – 69.0	Connecticut
58	Lincoln County	66.0%	62.5 – 69.5	South Dakota
59	Montgomery County	66.0%	62.6 – 69.0	Maryland
60	District of Columbia	66.0%	61.5 – 70.0	District of Columbia
61	Northwest Hills Planning Region	66.0%	62.9 – 68.8	Connecticut
62	Northeastern Connecticut Planning Region	66.0%	63.1 – 68.9	Connecticut
63	Milwaukee County	65.9%	62.8 – 69.0	Wisconsin
64	Green County	65.9%	60.9 – 70.7	Wisconsin
65	Marquette County	65.9%	60.9 – 70.7	Michigan
66	Nassau County	65.9%	61.7 – 69.9	Florida
67	Keweenaw County	65.8%	60.6 – 70.8	Michigan
68	Emmet County	65.8%	61.2 – 70.1	Michigan
69	Nantucket County	65.8%	60.9 – 70.7	Massachusetts
70	Orleans Parish	65.8%	61.3 – 70.1	Louisiana
71	Shawnee County	65.8%	62.5 – 69.1	Kansas
72	Carteret County	65.7%	60.5 – 70.7	North Carolina
73	Fulton County	65.7%	61.7 – 69.7	Georgia
74	Greater Bridgeport Planning Region	65.7%	62.3 – 69.0	Connecticut
75	Warren County	65.6%	61.1 – 70.1	New York
76	Hillsborough County	65.6%	62.2 – 69.1	New Hampshire
77	Lake County	65.6%	60.5 – 70.4	Minnesota
78	Woodford County	65.6%	60.4 – 70.5	Kentucky
79	Floyd County	65.6%	60.8 – 70.2	Indiana
80	Naugatuck Valley Planning Region	65.6%	63.1 – 67.9	Connecticut
81	La Crosse County	65.5%	60.7 – 69.9	Wisconsin
82	Lexington city	65.5%	60.4 – 70.4	Virginia
83	Washtenaw County	65.5%	61.9 – 68.7	Michigan
84	Hampshire County	65.5%	61.0 – 69.9	Massachusetts
85	Oldham County	65.5%	60.5 – 70.4	Kentucky
86	Poquoson city	65.4%	60.5 – 69.8	Virginia
87	Alexandria city	65.4%	60.5 – 70.3	Virginia
88	Carroll County	65.4%	60.8 – 69.8	New Hampshire
89	Macomb County	65.4%	61.4 – 69.3	Michigan
90	Ascension Parish	65.4%	60.6 – 70.0	Louisiana
91	Story County	65.4%	60.7 – 70.0	Iowa
92	Boone County	65.4%	60.4 – 70.3	Indiana
93	Oconee County	65.4%	60.6 – 69.9	Georgia
94	Henrico County	65.3%	60.9 – 69.5	Virginia
95	Brunswick County	65.3%	60.2 – 70.0	North Carolina
96	Ontario County	65.3%	60.8 – 69.8	New York
97	Stearns County	65.3%	60.7 – 69.6	Minnesota
98	Otter Tail County	65.3%	60.9 – 69.4	Minnesota
99	Dakota County	65.3%	61.8 – 68.5	Minnesota
100	Alger County	65.3%	60.1 – 70.1	Michigan

Lowest Colorectal Cancer Screening Rates — Bottom 100 CountiesCounties with the lowest reported colorectal cancer screening rates.

#	County	Rate	95% CI	State
1	Dimmit County	39.4%	34.0 – 44.7	Texas
2	Kusilvak Census Area	40.1%	34.6 – 45.7	Alaska
3	Kenedy County	40.1%	36.5 – 43.9	Texas
4	McKinley County	40.7%	35.4 – 45.8	New Mexico
5	Oglala Lakota County	41.2%	36.7 – 45.6	South Dakota
6	Todd County	41.4%	36.9 – 45.9	South Dakota
7	Starr County	41.9%	36.6 – 47.0	Texas
8	Jim Hogg County	42.0%	39.0 – 44.8	Texas
9	Zavala County	42.8%	37.2 – 48.6	Texas
10	Zapata County	43.1%	37.8 – 48.6	Texas
11	Hudspeth County	43.2%	37.6 – 48.4	Texas
12	Bethel Census Area	43.6%	38.5 – 48.5	Alaska
13	La Salle County	43.6%	41.1 – 46.0	Texas
14	Aleutians East Borough	43.8%	38.5 – 49.0	Alaska
15	Presidio County	43.8%	38.6 – 48.9	Texas
16	Union County	44.6%	39.3 – 50.3	New Mexico
17	Brooks County	44.9%	42.3 – 47.6	Texas
18	Apache County	45.1%	40.7 – 49.3	Arizona
19	Cochran County	45.1%	39.6 – 50.4	Texas
20	Imperial County	45.2%	40.0 – 50.4	California
21	Luna County	45.2%	40.0 – 50.6	New Mexico
22	Ziebach County	45.2%	39.7 – 50.5	South Dakota
23	Maverick County	45.2%	39.6 – 50.7	Texas
24	Webb County	45.3%	39.9 – 50.5	Texas
25	Sioux County	45.4%	39.7 – 51.0	North Dakota
26	Mellette County	45.4%	40.3 – 50.6	South Dakota
27	Lamb County	45.4%	40.4 – 50.9	Texas
28	Yuma County	45.5%	41.1 – 49.9	Arizona
29	Willacy County	45.6%	42.4 – 48.7	Texas
30	Cameron County	45.8%	41.5 – 50.5	Texas
31	Navajo County	46.0%	41.7 – 50.0	Arizona
32	Jim Wells County	46.4%	40.8 – 51.8	Texas
33	Santa Cruz County	46.5%	40.9 – 52.1	Arizona
34	Tulare County	46.7%	41.9 – 51.8	California
35	Corson County	46.7%	41.5 – 51.9	South Dakota
36	Deaf Smith County	46.7%	41.1 – 52.0	Texas
37	Dillingham Census Area	47.0%	41.7 – 52.1	Alaska
38	Val Verde County	47.0%	41.3 – 52.9	Texas
39	Hale County	47.1%	42.2 – 52.2	Texas
40	Moore County	47.1%	41.6 – 52.5	Texas
41	Nolan County	47.1%	41.6 – 52.6	Texas
42	Edwards County	47.2%	41.9 – 52.4	Texas
43	Swisher County	47.3%	41.3 – 53.2	Texas
44	Northwest Arctic Borough	47.4%	41.9 – 53.1	Alaska
45	Rio Arriba County	47.5%	42.1 – 53.0	New Mexico
46	Dawson County	47.5%	41.8 – 53.0	Texas
47	Frio County	47.5%	42.1 – 52.9	Texas
48	Big Horn County	47.5%	42.4 – 52.8	Wyoming
49	La Paz County	47.6%	42.2 – 52.9	Arizona
50	McMullen County	47.6%	42.0 – 53.3	Texas
51	Reeves County	47.6%	41.7 – 53.2	Texas
52	Bent County	47.7%	42.3 – 53.1	Colorado
53	Kiowa County	47.8%	42.1 – 53.6	Oklahoma
54	Carbon County	47.8%	42.4 – 53.1	Wyoming
55	Fremont County	47.8%	43.1 – 52.7	Wyoming
56	Nome Census Area	47.9%	42.6 – 53.4	Alaska
57	Glacier County	47.9%	42.8 – 53.1	Montana
58	Socorro County	47.9%	42.3 – 53.2	New Mexico
59	Texas County	47.9%	42.6 – 53.0	Oklahoma
60	Castro County	48.0%	42.5 – 53.4	Texas
61	Lake and Peninsula Borough	48.1%	42.5 – 53.3	Alaska
62	Elk County	48.1%	42.8 – 53.2	Kansas
63	Hidalgo County	48.1%	42.6 – 53.5	New Mexico
64	Otero County	48.1%	42.9 – 53.3	New Mexico
65	Briscoe County	48.1%	44.7 – 51.7	Texas
66	Newton County	48.1%	42.7 – 53.4	Texas
67	Garza County	48.2%	42.7 – 53.5	Texas
68	Lea County	48.3%	42.9 – 53.5	New Mexico
69	Culberson County	48.3%	45.8 – 51.0	Texas
70	Chaves County	48.4%	43.2 – 53.7	New Mexico
71	Sierra County	48.4%	42.5 – 53.6	New Mexico
72	Duval County	48.4%	42.4 – 54.4	Texas
73	Uvalde County	48.4%	43.0 – 53.9	Texas
74	Graham County	48.5%	42.8 – 54.1	Arizona
75	Mohave County	48.5%	44.2 – 52.9	Arizona
76	McDonald County	48.5%	43.0 – 54.0	Missouri
77	Torrance County	48.5%	42.9 – 54.0	New Mexico
78	Harmon County	48.5%	42.9 – 54.1	Oklahoma
79	Johnson County	48.5%	42.6 – 54.4	Wyoming
80	Cibola County	48.6%	43.5 – 53.5	New Mexico
81	Doña Ana County	48.6%	44.0 – 53.3	New Mexico
82	Upton County	48.6%	45.9 – 51.9	Texas
83	Blaine County	48.7%	43.8 – 53.8	Montana
84	Guadalupe County	48.7%	43.1 – 54.4	New Mexico
85	Weston County	48.8%	43.6 – 53.9	Wyoming
86	Roosevelt County	48.9%	43.4 – 54.2	New Mexico
87	Floyd County	48.9%	44.0 – 53.9	Texas
88	Live Oak County	48.9%	43.5 – 54.2	Texas
89	Parmer County	48.9%	43.3 – 54.3	Texas
90	Curry County	49.0%	43.6 – 54.7	New Mexico
91	Buffalo County	49.0%	43.6 – 54.1	South Dakota
92	Yoakum County	49.0%	43.9 – 54.5	Texas
93	Prince of Wales-Hyder Census Area	49.1%	43.6 – 54.0	Alaska
94	Stanton County	49.1%	43.6 – 54.7	Kansas
95	San Juan County	49.1%	44.7 – 53.4	New Mexico
96	Kearny County	49.2%	43.5 – 55.0	Kansas
97	Big Horn County	49.2%	44.6 – 54.3	Montana
98	Quay County	49.2%	43.4 – 55.2	New Mexico
99	San Miguel County	49.2%	43.6 – 54.9	New Mexico
100	Seminole County	49.2%	43.5 – 54.6	Oklahoma

What this ranking suggests

Colorectal screening uptake is one of the clearest preventable-mortality signals in the dataset. Counties with low screening rates and high cancer-prevalence ranking are the cleanest case for clinical and public-health investment.

Methodology notes & limitations

Estimates are statistical model outputs, not direct measurements. Small counties have wider confidence intervals; treat narrow rank differences in those rows as within-noise. Counties where the underlying population is too small to support modeling are suppressed entirely (about 1% of US counties). All measures are age-adjusted to the 2000 US standard population. The PLACES dataset uses BRFSS self-reported data — self-report introduces known direction-of-bias in some measures (BMI is under-reported; binge drinking is under-reported), but the bias is roughly uniform across counties so ranking comparability is preserved. See the methodology page for full data-pipeline documentation.

By Logan Johnson, Founder & Data EditorPublished May 15, 2026Reviewed by Logan Johnson, Founder & Data Editor

Data source: CDC PLACES 2023 release. Measure ID: COLON_SCREEN.

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