Medicare in Cobb County
Cobb County is in Georgia, and its county seat is Marietta. The U.S. Census Bureau's 2023 population estimates count 109,539 residents age 65 and older in Cobb County. Many of them are choosing between Original Medicare, Medicare Advantage, Medigap and Part D coverage each year.
Wellstar Kennestone Regional Medical Center in Marietta and Wellstar Cobb Medical Center in Austell are among the hospitals that serve Cobb County residents. Medicare Advantage and Part D plan availability, and the doctor and hospital networks that come with them, are set county by county, so we check the options for your ZIP code and your providers rather than guessing. We work with Cobb County residents by phone or video call.
Cobb County Medicare at a glance
| Cobb County | Georgia | |
|---|---|---|
| Residents age 65 and older | 109,539 | 1,696,217 statewide |
| Share of residents age 65+ | 14.1% | 15.4% statewide |
| People with Medicare | 124,737 | 2,041,931 statewide |
| Enrolled in Medicare Advantage | 60,782 | 1,148,032 statewide |
| Medicare Advantage share | 48.7% | 56.2% statewide |
Figures come from the Census Bureau and CMS (September 2026).
Among Georgia’s 159 counties, Cobb County comes in 3rd for residents age 65 and up (109,539). Older adults make up 14.1% of the population here; the state figure is 15.4%. Another 45,858 residents are age 60 to 64 and will reach Medicare eligibility within about five years (see our turning 65 guide). By age, the 65-and-older group splits 61% ages 65 to 74, 30% ages 75 to 84 and 9% age 85 and up (Census 2023). Medicare Advantage enrollment in Cobb County is 48.7% of people with Medicare, lower than the Georgia average of 56.2%. A county average does not tell you which kind of plan fits you. Whether Medicare Advantage or Original Medicare with a Medigap plan is the better fit depends on your doctors, your prescriptions and how you want to handle costs, so we compare both for your ZIP code.
Who has Medicare in Cobb County
Cobb County is a metro county; the U.S. Department of Agriculture describes it as: counties in metro areas of 1 million population or more. Metro counties usually have more hospitals and more insurers competing for Medicare members, so there can be more plans to compare.
CMS counts 119,856 Medicare beneficiaries in Cobb County (2023). Their average age is 74, about the same as the Georgia average of 73. About 7% are “dual eligible,” meaning they have both Medicare and Medicaid, lower than the state figure of 12%.
Among people in Original Medicare in Cobb County, CMS reported about 486 emergency room visits and 217 inpatient hospital stays per 1,000 beneficiaries in 2023, which is lower than the state average for emergency visits (560) and close to it for hospital stays (223). About 7% received home health care. These figures describe how people use care under Original Medicare; they do not show what any plan covers or costs.
Sources: CMS Medicare Geographic Variation, 2023; USDA Rural-Urban Continuum Codes, 2023.
Cobb County: communities and ZIP codes
Census Bureau 2023 estimates put the biggest communities in Cobb County at Marietta (62,769), Smyrna (56,566), Kennesaw (34,683), Acworth (22,379), Powder Springs (18,950), Austell (8,020), counting only the part of each community inside the county.
Census ZIP Code Tabulation Areas mostly within Cobb County number 19: 30008, 30060, 30062, 30064, 30066, 30067, 30068, 30080, 30082, 30090, 30101, 30106, 30111, 30126 and 5 more. Your exact ZIP code is what decides which plans you can join.
Questions about Medicare in Cobb County?
Reach out to us: fill out our short form or call (571) 354-0146, and a licensed agent will compare the plans available to you, check your doctors and drugs, and stay with you each year at renewal. For general Medicare information, the federal helpline is 1-800-MEDICARE (1-800-633-4227).
Medicare resources from official sources
- Medicare Plan Finder on Medicare.gov, searchable by ZIP code.
- Georgia Access, Georgia’s own health insurance exchange, if you are not yet on Medicare.
- Medicare Care Compare for hospitals and doctors.
- Social Security: Medicare to enroll or check status.
- Georgia Office of Insurance and Safety Fire Commissioner: Georgia’s insurance regulator, including agent license lookup.
Coverage we offer Cobb County residents
We work with many carriers, which lets us compare more than one option for Cobb County households, including annuities, Medicare Advantage, Medicare Supplement (Medigap), Part D drug plans, ACA health insurance, ICHRA, group health insurance, life insurance and final expense insurance.
Let's check your Cobb County options together
We will confirm your doctors and prescriptions before you enroll, at no cost to you.
Get my plan comparisonSource: U.S. Census Bureau, 2023 population estimates. Honorbrook is based in Tysons, Virginia, and serves Georgia residents by phone and video.
Read next
- Why a Medicare Advantage plan drops a doctor or drug
- Medigap Plan G vs. Plan N
- Medicare Advantage vs. Medigap: how to choose
- Does Medicare cover dental, vision and hearing?
Cobb County compared with similar Georgia counties
| County | Residents 65+ | Medicare Advantage share | Dual eligible share | Area type |
|---|---|---|---|---|
| DeKalb County | 108,754 | 60.1% | 14% | Metro |
| Gwinnett County | 115,777 | 57.3% | 11% | Metro |
| Fulton County | 141,433 | 55.1% | 10% | Metro |
| Chatham County | 52,167 | 55.0% | 9% | Metro |
| Cherokee County | 47,079 | 47.1% | 5% | Metro |
| Hall County | 36,099 | 49.9% | 9% | Metro |
See every Georgia county in our Georgia directory or go to our Georgia Medicare hub.