What Is Gerontology? Research Areas, Funding, and Career Paths

Gerontology is the scientific study of aging — the biological, psychological, and social processes that occur across the human lifespan, and especially in later life. It is a deliberately interdisciplinary field: gerontologists draw on biology, medicine, psychology, sociology, economics, public health, and social work to understand not just why and how organisms age, but how individuals and societies adapt to population aging. Gerontology is broader than geriatrics, which is the clinical medical specialty focused on diagnosing and treating disease in older patients — geriatrics is a branch of medicine; gerontology is the broader science that geriatric medicine (along with nursing, social work, and public policy) draws on.

The field asks questions at several scales at once: What cellular and molecular mechanisms drive senescence? How do cognition, memory, and personality change (or don’t) across the lifespan? How do social roles, family structures, and economic security shift with age, and how do societies plan for a population living longer, on average, than at any point in recorded history? A gerontologist might study telomere shortening in a lab, run a longitudinal cohort study tracking cognitive decline over decades, or analyze how pension policy affects retirement timing — all under the same disciplinary umbrella.

What Gerontology Studies: Core Questions and Approaches

Gerontology research generally organizes around three broad, overlapping domains:

• Biological aging (biogerontology): the physiological mechanisms of senescence at the cellular, tissue, and organ-system level — why cells stop dividing, why tissue repair slows, why age is the single largest risk factor for most chronic disease.
• Psychological aging: how cognition, memory, personality, emotional regulation, and mental health change across the lifespan, including both normal cognitive aging and pathological decline (e.g., dementia).
• Social aging: how age intersects with social roles, family caregiving, work and retirement, housing, economic security, and health disparities — and how policy and the built environment can support or undermine independence in later life.

Because these domains interact — a social determinant like isolation has measurable biological and cognitive effects, for instance — most gerontology programs are explicitly structured as interdisciplinary, not housed inside a single home department the way a discipline like biology or psychology typically is.

Gerontology vs. Geriatrics and Neighboring Fields

These terms are related but not interchangeable, and mixing them up is one of the most common points of confusion for people new to the field:

• Gerontology is the science of aging broadly — it includes researchers who may never see a patient (a social gerontologist studying retirement policy, a biogerontologist studying cell senescence in a lab model organism).
• Geriatrics is a medical specialty: physicians (geriatricians) trained to diagnose and manage the health conditions common in older adults, typically after a residency in internal medicine or family medicine plus a geriatric medicine fellowship.
• Geriatric nursing / geriatric social work apply gerontological knowledge within nursing and social-work practice respectively — professional practice fields, not the basic science itself.
• Epidemiology of aging studies the distribution and determinants of disease and health outcomes in aging populations at a population level, overlapping heavily with social and biological gerontology but methodologically closer to epidemiology generally.
• Sociology of aging is essentially the social-gerontology domain viewed through a sociological lens — age stratification, cohort effects, and social structures.

Major Sub-disciplines Within Gerontology

Beyond the biological/psychological/social split above, gerontology programs and journals commonly recognize several more specific subfields:

• Biogerontology / biology of aging: cellular senescence, oxidative stress, mitochondrial function, and the broader mechanisms proposed to drive aging at the molecular level.
• Neurogerontology / cognitive aging: age-related changes in brain structure and function, and their relationship to memory, processing speed, and dementia risk.
• Social gerontology: the study of aging as a social phenomenon — family caregiving, retirement, ageism, housing, and social policy for older populations.
• Gerontechnology: the design and application of technology (assistive devices, remote monitoring, smart-home systems) to support independence and quality of life in aging populations.
• Environmental gerontology: how the physical and built environment — housing design, neighborhood walkability, “aging in place” infrastructure — affects wellbeing in later life.
• Comparative / evolutionary gerontology: aging studied across species, used to test hypotheses about why aging evolved and what it might reveal about human aging mechanisms.

Life-course and longitudinal designs sit underneath most of these subfields as a shared methodological backbone — see CASRAI’s guide to longitudinal study design for how researchers structure a study that follows the same cohort across years or decades, the design pattern behind landmark aging studies like the Baltimore Longitudinal Study of Aging and the Health and Retirement Study.

Funding the Field: Who Pays for Gerontology Research

Gerontology research in the United States is funded through a mix of federal agencies and a small number of prominent private foundations. Research administrators supporting a gerontology-adjacent PI should know the landscape looks like this:

• National Institute on Aging (NIA) — one of the 27 institutes and centers at the National Institutes of Health (NIH), and the primary federal funder of aging research in the US. NIA supports basic biology of aging, Alzheimer’s and dementia research, and social/behavioral research on aging through its standard extramural mechanisms (R01, R21, F- and T-series training awards, among others), the same NIH-wide funding-mechanism structure used across other institutes.
• Other NIH institutes fund aging-adjacent work within their own missions where it intersects — for example, neurological and cognitive aging can fall under NINDS or NIMH depending on the specific research question, and health-disparities-focused aging research can fall under NIMHD.
• Administration for Community Living (ACL) — the HHS operating division (which absorbed the Administration on Aging) that funds applied aging-services research and programs under the Older Americans Act, distinct from NIH’s basic/clinical research focus.
• National Science Foundation (NSF) — funds aging-related work that is fundamentally about cognition, behavior, or social science methodology rather than health outcomes, most often through its Social, Behavioral and Economic Sciences directorate.
• Private foundations: the John A. Hartford Foundation is the most prominent private funder specifically focused on improving care for older adults (Age-Friendly Health Systems, family caregiving, and serious-illness care are its named priority areas), and philanthropic funding for dementia-specific research also flows through organizations such as the Alzheimer’s Association.

As with any funding landscape, program priorities and specific funding-opportunity announcements change; a research administrator scoping a proposal should verify current mechanisms directly against grants.gov and the funding institute’s own current notices rather than treating this list as exhaustive or static.

Research Methods and Tools Used in Gerontology

Because gerontology spans biological, psychological, and social domains, its methodological toolkit is correspondingly broad:

• Longitudinal cohort studies are the field’s signature design — following the same group of people over years or decades to separate true aging effects from generational (cohort) effects, which a single cross-sectional snapshot cannot do. See CASRAI’s guide to longitudinal study design for the underlying methodology.
• Cross-sectional and cross-sequential designs are used where a full longitudinal study isn’t feasible, with cross-sequential designs (combining cross-sectional and longitudinal sampling) specifically built to help disentangle age, cohort, and period effects.
• Standardized cognitive and functional assessment instruments — validated screening and assessment tools used across clinical and research settings to measure cognition, frailty, and activities-of-daily-living function.
• Cell and animal models of aging — model organisms (yeast, C. elegans, mice) and cell-culture senescence assays used in biogerontology to study aging mechanisms under controlled conditions.
• Biomarkers of biological age — measures (such as epigenetic “clocks” and inflammatory markers) that researchers use as a proxy for biological aging distinct from chronological age, an active and still-evolving area of methodology.
• Large secondary datasets — nationally representative panel surveys are widely used as secondary-analysis data sources in social and health gerontology rather than every study collecting new primary data.

Statistical practice in gerontology follows the same core toolkit covered in CASRAI’s broader research methods content — including field-specific conventions on effect size interpretation; see How to Interpret Cohen’s d and Effect Size in Research for how gerontology’s own published-literature benchmarks for a “typical” effect differ from psychology’s or education’s.

Career and Training Pathways

Gerontology is taught at the undergraduate, master’s, and doctoral level, and — because the field is interdisciplinary by design — training pathways vary more than in a single-department discipline:

• Undergraduate: a growing number of universities offer a gerontology major, minor, or certificate, often housed within a sociology, psychology, public health, or human-development department rather than a standalone department.
• Graduate: master’s and PhD programs in gerontology (or “aging studies”) typically require coursework spanning biological, psychological, and social aging plus a research methods sequence, culminating in an original dissertation for PhD candidates. Some students instead pursue a PhD in a home discipline (psychology, sociology, epidemiology, biology) with an aging specialization rather than a dedicated gerontology department, depending on the institution.
• Clinical pathway: physicians who want to practice geriatric medicine specifically complete an internal medicine or family medicine residency followed by a geriatric medicine fellowship and board certification — a distinct track from a gerontology PhD, though the two fields work closely together.
• Professional societies: the Gerontological Society of America (GSA), founded in 1945, is the oldest and largest interdisciplinary organization for aging research, education, and practice in the US, publishing peer-reviewed journals and convening an annual scientific meeting. The American Geriatrics Society (AGS), founded in 1942, is the corresponding professional society for the clinical/medical side of the field. Both maintain their own certification, mentorship, and career-development resources worth checking directly for current requirements.

Frequently Asked Questions

Is gerontology the same as geriatrics?

No. Gerontology is the broad scientific study of aging across biological, psychological, and social domains; geriatrics is the clinical medical specialty focused on diagnosing and treating disease in older patients. A geriatrician typically has a gerontology-adjacent education but is trained and credentialed as a physician; many gerontologists are not physicians at all.

What degree do you need to work in gerontology?

It depends on the role. Research and academic positions typically require a PhD (either in gerontology specifically or in a home discipline with an aging specialization); many applied roles in aging services, care management, or program administration are accessible with a bachelor’s or master’s degree in gerontology, social work, public health, or a related field.

What is the difference between social gerontology and biogerontology?

Social gerontology studies aging as a social phenomenon — family, work, retirement, policy, and social structure. Biogerontology studies the biological and cellular mechanisms of aging itself. Both are subfields under the same broader discipline and frequently inform each other.

Who funds gerontology research in the US?

The National Institute on Aging (NIA) at NIH is the primary federal funder, alongside other NIH institutes where aging intersects their own mission, the Administration for Community Living for applied aging-services research, NSF for behavioral/social-science aging research, and private foundations such as the John A. Hartford Foundation.

Related CASRAI Guides

This page is part of CASRAI’s Branches of Science series. For neighboring disciplines that overlap heavily with gerontology, see What Is Psychology?, What Is Sociology?, and What Is Epidemiology?. For the research-methods backbone underlying most aging research, see Longitudinal Study Design and the Research Methods hub. Public health and nursing science content covering aging-population health and geriatric care from complementary angles is also part of this same content wave.