Maps of clusters of states with the highest thyroid cancer rates in the USA

Below are maps of clusters of states with the highest thyroid cancer rates in the USA. The clusters were found by counting the number of shared borders among states with the highest thyroid cancer incidence and mortality rates for every combination of gender and race/ethnicity.

Included are also the lists of states with the highest thyroid cancer rates.

To learn more about this study, please read the main article. You may also want to read the map guidelines and glossary of terms.

You can view geographic clusters involving other cancers:

White women thyroid cancer incidence rates

Map of USA. A few states are colored red, a few are colored purple, a few are colored green, and most are colored gray.

Figure 1: A cluster of states with the highest thyroid cancer incidence rates of white women

Shared-border ratio: 147% (22 shared borders among 15 states)

List of states with highest rates:

	State	Rate (per 100,000)
1	Pennsylvania	31.8
2	New Jersey	30.8
3	Rhode Island	30.2
4	New York	29.7
5	Utah	29.5
6	Connecticut	29.4
7	Massachusetts	28.9
8	District of Columbia	25.2
9	Idaho	25.2
10	Maryland	24.8
11	Kansas	24.7
12	Arizona	24.2
13	New Mexico	23.5
14	Colorado	23.4
15	Delaware	23.2

(Number of states in the contiguous U.S. with numerical cancer rates in the CDC file: 48)

Black women thyroid cancer incidence rates

Figure 2: A cluster of states with the highest thyroid cancer incidence rates of black women

Shared-border ratio: 107% (16 shared borders among 15 states)

List of states with highest rates:

	State	Rate (per 100,000)	Color
1	Massachusetts	22.5
2	Pennsylvania	22.2
3	Rhode Island	21.5
4	Kansas	18.7
5	District of Columbia	18
6	Arizona	16.7
7	Connecticut	16.6
8	Delaware	15.9
9	Washington	15.4	Not In Cluster
10	Colorado	15.3
11	Ohio	15.3
12	New York	15.1
13	Maryland	15
14	Oregon	14.3	Not In Cluster
15	Michigan	14.1

(Number of states in the contiguous U.S. with numerical cancer rates in the CDC file: 38)