American Speech-Language-Hearing Association

ASHA-Certified Personnel-to-Population Ratios

Table 1. Personnel-to-Population Ratios for ASHA-Certified Audiologists and Speech-Language Pathologists by State, and State Rank, 2013 [PDF]

Table 2. Personnel-to-Population Ratios for ASHA-Certified Audiologists and Speech-Language Pathologists by Geographic Region and Division, 2013 [PDF]

Frequently Asked Questions

What are personnel-to-population ratios?

They are a measurement of the number of a given class of personnel (e.g., ASHA-certified audiologists or speech-language pathologists) in relation to the overall population in a given geographic area (e.g., state, region, or country).

How are personnel-to-population ratios calculated?

They are calculated by dividing the number of specified personnel in a given geographic area by the population of that area. The resulting number is then multiplied by 100,000 to arrive at the number of personnel per 100,000 people in the area. For example, Florida had approximately 7,930 ASHA-certified speech-language pathologists and an estimated population of 19,552,860 people in 2013. Its personnel-to-population ratio is then calculated as (7,930/19,552,860) x 100,000 = 40.6. In other words, there were 40.6 speech-language pathologists for every 100,000 Floridians in 2013.

How are counts of ASHA-certified audiologists and speech-language pathologists determined?

ASHA uses membership data to compile annual counts of ASHA-certified audiologists and speech-language pathologists (see ASHA Counts for Year End 2013, Table 3: ASHA Affiliation by State and Certification Status).

What is the source of state population estimates?

The U.S. Census Bureau of the U.S. Department of Commerce estimates state populations on a periodic basis. These estimates are available on the Bureau's website. They are also included above in Table 1.

What are the national personnel-to-population ratios for ASHA-certified audiologists and speech-language pathologists?

In 2013, nationwide, the number of ASHA-certified audiologists for every 100,000 residents was 4.0, ranging from 1.6 in Montana to 7.0 in Colorado. The number of ASHA-certified speech-language pathologists for every 100,000 residents was 45.0, ranging from 22.3 in Nevada to 71.8 in Arkansas.

Have the national personnel-to-population ratios for audiologists and speech-language pathologists changed over time?

The 2013 nationwide ratio of 4.0 for audiologists was down slightly from the ratio of 4.1 reported for 2008, 2009, 2010, 2011, and 2012. The nationwide ratio of 45.0 for speech-language pathologists was up from 38.3 in 2008, 39.7 in 2009, 41.4 in 2010, 42.3 in 2011, and 43.5 in 2012.

What are the regional personnel-to-population ratios for ASHA-certified audiologists and speech-language pathologists?

In 2013, nationwide, the number of ASHA-certified audiologists ranged from 4.1 in the West to 5.2 in the Midwest. For ASHA-certified speech-language-pathologists, it ranged from 39.3 in the West to 59.7 in the Northeast.

What is a "good" personnel-to-population ratio?

ASHA presents personnel-to-population ratios; we do not determine ideal ratios for states and regions. However, "good" ratios vary by state and region and depend on many factors, such as population density, median age of the population, service needs, presence of support personnel, and other factors.

Why are personnel-to-population ratios important?

By knowing the personnel-to-population ratio for a state or region we can then compare that state or region to other states, regions, or the national average. This information can be used to (a) affect policy changes to ensure that all populations are adequately served, (b) determine trends, (c) offer information for individuals considering relocation, and (d) potentially foster growth of the professions within a given state or region.

Still have questions?
Contact Gail Brook, research associate, Surveys and Analysis, at gbrook@asha.org or data@asha.org.

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