Data / Rankings / Current asthma in adults, local model estimate / Counties in Maryland

Counties in Maryland by current asthma in adults, local model estimate, 2023

Baltimore city had the highest current asthma in adults, local model estimate of 24 counties in 2023, at 12.7%. Howard County had the lowest, at 9.1%. The median was 10.6%. Source: the Centers for Disease Control and Prevention.

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Highest12.7Baltimore city
Lowest9.1Howard County
Median10.624 counties

Map of counties, 2023

Allegany County: 11.3 %Anne Arundel County: 10 %Baltimore County: 11 %Calvert County: 10.5 %Caroline County: 11.8 %Carroll County: 10.1 %Cecil County: 10.5 %Charles County: 10.7 %Dorchester County: 11.5 %Frederick County: 9.5 %Garrett County: 11.1 %Harford County: 10.2 %Howard County: 9.1 %Kent County: 10.6 %Montgomery County: 9.2 %Prince George's County: 11.5 %Queen Anne's County: 9.9 %St. Mary's County: 10.7 %Somerset County: 11.7 %Talbot County: 10.3 %Washington County: 10.7 %Wicomico County: 11.1 %Worcester County: 10.1 %Baltimore city: 12.7 %
  • Under 10
  • 10 to 11
  • 11 and over
%, 2023. Source: CDC, PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2023

Baltimore city: 12.7 %Baltimore city12.7Caroline County: 11.8 %Caroline County11.8Somerset County: 11.7 %Somerset County11.7Dorchester County: 11.5 %Dorchester County11.5Prince George's County: 11.5 %Prince George's County11.5Allegany County: 11.3 %Allegany County11.3Garrett County: 11.1 %Garrett County11.1Wicomico County: 11.1 %Wicomico County11.1Baltimore County: 11 %Baltimore County11Charles County: 10.7 %Charles County10.7St. Mary's County: 10.7 %St. Mary's County10.7Washington County: 10.7 %Washington County10.7Kent County: 10.6 %Kent County10.6Calvert County: 10.5 %Calvert County10.5Cecil County: 10.5 %Cecil County10.5Talbot County: 10.3 %Talbot County10.3Harford County: 10.2 %Harford County10.2Carroll County: 10.1 %Carroll County10.1Worcester County: 10.1 %Worcester County10.1Anne Arundel County: 10 %Anne Arundel County10Queen Anne's County: 9.9 %Queen Anne's County9.9Frederick County: 9.5 %Frederick County9.5Montgomery County: 9.2 %Montgomery County9.2Howard County: 9.1 %Howard County9.1Baltimore city: 12.7 %Baltimore city12.7Caroline County: 11.8 %Caroline County11.8Somerset County: 11.7 %Somerset County11.7Dorchester County: 11.5 %Dorchester County11.5Prince George's County: 11.5 %Prince George's County11.5Allegany County: 11.3 %Allegany County11.3Garrett County: 11.1 %Garrett County11.1Wicomico County: 11.1 %Wicomico County11.1Baltimore County: 11 %Baltimore County11Charles County: 10.7 %Charles County10.7St. Mary's County: 10.7 %St. Mary's County10.7Washington County: 10.7 %Washington County10.7Kent County: 10.6 %Kent County10.6Calvert County: 10.5 %Calvert County10.5Cecil County: 10.5 %Cecil County10.5Talbot County: 10.3 %Talbot County10.3Harford County: 10.2 %Harford County10.2Carroll County: 10.1 %Carroll County10.1Worcester County: 10.1 %Worcester County10.1Anne Arundel County: 10 %Anne Arundel County10Queen Anne's County: 9.9 %Queen Anne's County9.9Frederick County: 9.5 %Frederick County9.5Montgomery County: 9.2 %Montgomery County9.2Howard County: 9.1 %Howard County9.1
%. Source: CDC, PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence. Retrieved 2026-10-12.

Full ranking

RankCounties2023 (%)Change on 2022
1Baltimore city12.7+0.4 pts
2Caroline County11.8-0.2 pts
3Somerset County11.7-0.8 pts
4Dorchester County11.5-0.6 pts
4Prince George's County11.5+0.8 pts
6Allegany County11.3-0.8 pts
7Garrett County11.10 pts
7Wicomico County11.1-0.8 pts
9Baltimore County11-0.3 pts
10Charles County10.7-1.3 pts
10St. Mary's County10.7-0.3 pts
10Washington County10.7-1.5 pts
13Kent County10.6-0.2 pts
14Calvert County10.5-0.1 pts
14Cecil County10.5-1 pts
16Talbot County10.3-0.6 pts
17Harford County10.2-0.3 pts
18Carroll County10.1-0.1 pts
18Worcester County10.1-0.6 pts
20Anne Arundel County10-0.4 pts
21Queen Anne's County9.9-0.9 pts
22Frederick County9.5-0.1 pts
23Montgomery County9.2-0.2 pts
24Howard County9.1-0.6 pts

Other periods

About this ranking

Percentage of adults who have ever been told by a doctor, nurse or other health professional that they have asthma and say they still have it. Model-based estimate for adults aged 18 and over from CDC PLACES. Crude prevalence, not age-adjusted.

US counties and cities (incorporated places of 10,000 or more). CDC PLACES combines Behavioral Risk Factor Surveillance System (BRFSS) answers with local population data through multilevel regression and poststratification, so a county or city value is a model estimate, not a survey count. The year is the BRFSS survey year, not the release year. CDC says the method does not support tracking change in a place over time, and each annual release can change the model, so values for different years are not strictly comparable. A state is missing in a year when its BRFSS data did not meet standards (Kentucky and Pennsylvania in 2023, Florida in 2021). Connecticut counties appear as its nine planning regions from 2022; its eight former counties are not served. City values for 2021 come from the 2023 release, built on 2010 Census place boundaries; later years use 2020 boundaries.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

Centers for Disease Control and Prevention (CDC). PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence. https://www.cdc.gov/places/. Retrieved 2026-10-12. These data are available free from CDC. Use does not imply endorsement by CDC, ATSDR, HHS or the United States Government.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

Centers for Disease Control and Prevention. (2025). PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence (Counties in Maryland by current asthma in adults, local model estimate, 2023) [Data set]. Retrieved October 12, 2026, from https://www.cdc.gov/places/

MLA 9

PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence, Counties in Maryland by current asthma in adults, local model estimate, 2023. Centers for Disease Control and Prevention, 4 Dec. 2025, https://www.cdc.gov/places/. Invokely, https://invokely.ai/rankings/adult-asthma-rate-county-estimate/maryland-counties. Accessed 12 Oct. 2026.

Chicago (author-date)

Centers for Disease Control and Prevention. 2025. PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence. Counties in Maryland by current asthma in adults, local model estimate, 2023. Dataset. Accessed October 12, 2026. https://www.cdc.gov/places/. Also distributed by Invokely, https://invokely.ai/rankings/adult-asthma-rate-county-estimate/maryland-counties.

Harvard

Centers for Disease Control and Prevention (2025) PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence, Counties in Maryland by current asthma in adults, local model estimate, 2023 [Dataset]. Available at: https://www.cdc.gov/places/, via Invokely: https://invokely.ai/rankings/adult-asthma-rate-county-estimate/maryland-counties (Accessed: 12 October 2026).

BibTeX
@misc{centers_counties_in_maryland_by_2023,
  author = {{Centers for Disease Control and Prevention}},
  title = {{PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence: Counties in Maryland by current asthma in adults, local model estimate, 2023}},
  year = {2025},
  howpublished = {Data set},
  url = {https://www.cdc.gov/places/},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/adult-asthma-rate-county-estimate/maryland-counties. Publisher attribution: Centers for Disease Control and Prevention (CDC). PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence. https://www.cdc.gov/places/. Retrieved 2026-10-12. These data are available free from CDC. Use does not imply endorsement by CDC, ATSDR, HHS or the United States Government.},
}
RIS
TY  - DATA
AU  - Centers for Disease Control and Prevention
TI  - PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence: Counties in Maryland by current asthma in adults, local model estimate, 2023
PY  - 2025
DA  - 2025/12/04
PB  - Centers for Disease Control and Prevention
DB  - Invokely
UR  - https://www.cdc.gov/places/
L2  - https://invokely.ai/rankings/adult-asthma-rate-county-estimate/maryland-counties
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/adult-asthma-rate-county-estimate/maryland-counties.
N1  - Publisher attribution: Centers for Disease Control and Prevention (CDC). PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence. https://www.cdc.gov/places/. Retrieved 2026-10-12. These data are available free from CDC. Use does not imply endorsement by CDC, ATSDR, HHS or the United States Government.
ER  -
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Rank Counties in Maryland by current asthma in adults, local model estimate using official data, and cite the source.
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Questions

Which county has the highest current asthma in adults, local model estimate?

Baltimore city, with 12.7% in 2023, according to the Centers for Disease Control and Prevention.

Which county has the lowest current asthma in adults, local model estimate?

Howard County, with 9.1% in 2023.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: Centers for Disease Control and Prevention, PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence. Retrieved 2026-10-12.

Current asthma in adults, local model estimate: other rankings

Counties in Maryland: more rankings