Memphis Metropolitan Statistical Area (MSA) Definition and Data

The Memphis Metropolitan Statistical Area is a federally designated geographic unit used for statistical, planning, and funding purposes across a multi-state region anchored by Memphis, Tennessee. This page covers how the MSA is defined, which counties it includes, the federal mechanics that govern its boundaries, and the tradeoffs embedded in applying a single statistical boundary to a fragmented tri-state jurisdiction. Understanding the distinction between the MSA and the City of Memphis is essential for interpreting population counts, labor market data, and federal resource allocations correctly.

Definition and Scope

The Memphis MSA is a core-based statistical area (CBSA) defined by the U.S. Office of Management and Budget (OMB) under standards published in the Federal Register. As of the 2023 OMB delineation update (OMB Bulletin 23-01), the Memphis MSA encompasses 10 counties spanning Tennessee, Mississippi, and Arkansas — making it one of fewer than 20 MSAs in the United States that cross 3 state lines.

The designation centers on Shelby County, Tennessee, which contains the City of Memphis and serves as the principal city anchor for the MSA's core. Surrounding counties qualify for inclusion based on commuting patterns and economic integration with that core, not on contiguous urban development or shared governance. The MSA's total population exceeds 1.3 million residents, according to U.S. Census Bureau estimates, positioning it among the 40 largest metropolitan areas in the country by population.

Federal agencies — including the Department of Housing and Urban Development, the Bureau of Labor Statistics, and the Census Bureau — use the MSA boundary as a common geographic unit for publishing economic statistics, allocating formula-based grants, and benchmarking regional labor markets. The practical consequence is that a county's inclusion or exclusion from the MSA directly affects how its residents are counted in workforce surveys, poverty statistics, and housing cost indices. Detailed demographic breakdowns are maintained on the Memphis Metro Population and Demographics reference page.

Core Mechanics or Structure

The OMB constructs MSAs using a two-stage framework. First, it identifies an urbanized area of at least 50,000 people — the urban core — using Census Bureau delineation. Second, it applies a commuting threshold: any county (or county equivalent) in which 25 percent or more of employed residents commute to the core county, or from which 25 percent of the core county's workforce is drawn, qualifies for inclusion (OMB Statistical Policy Directive No. 14).

For the Memphis MSA, Shelby County, Tennessee is the core county. The 9 outlying counties that meet the commuting threshold are spread across 3 states:

The U.S. Census Bureau publishes annual population estimates at the CBSA level through its Population Estimates Program. The Bureau of Labor Statistics reports unemployment rates and nonfarm payroll employment at the MSA level on a monthly basis through the Local Area Unemployment Statistics (LAUS) program. These figures are not interchangeable with city-level or county-level statistics, because the MSA aggregates data across all 10 counties regardless of state.

The Memphis Metro Counties page documents county-level characteristics within the MSA boundary in detail.

Causal Relationships or Drivers

The geographic footprint of the Memphis MSA is driven primarily by three structural factors: the regional highway network, the Mississippi River corridor, and the concentration of logistics employment in Shelby County.

Interstate 40, Interstate 55, and Interstate 269 create commuting corridors that extend well beyond Shelby County's borders. DeSoto County, Mississippi — which borders Shelby County directly to the south — has experienced the fastest population growth of any county in the MSA over the past two decades, driven largely by residents who work in Memphis but seek lower housing costs and different tax structures across the state line. The Memphis Metro Mississippi Border page examines this cross-state dynamic in detail.

The logistics sector is a primary economic driver. Memphis International Airport handles more air cargo than any other airport in North America by tonnage, according to Airports Council International rankings. FedEx Corporation, headquartered in Memphis, maintains its global superhub at Memphis International Airport. This concentration of freight employment generates shift-work commuting patterns that extend into multiple surrounding counties and reinforces the economic integration that OMB's commuting threshold is designed to measure.

The Memphis Metro Logistics Hub page covers freight infrastructure in greater depth, and the Memphis Metro Economic Profile addresses sector-level employment composition.

Classification Boundaries

The OMB distinguishes between Metropolitan Statistical Areas and Micropolitan Statistical Areas. An MSA requires an urban core of at least 50,000; a Micropolitan Statistical Area requires a core of 10,000 to 49,999. Memphis qualifies as a Metropolitan area by a wide margin.

Within the Memphis MSA, OMB also defines a Metropolitan Division if the MSA's core contains more than one large urban county. The Memphis MSA does not currently have a metropolitan division designation — the entire 10-county area functions as a single CBSA under OMB Bulletin 23-01.

The MSA boundary differs from two related federal geographic units that users often conflate:

  1. Combined Statistical Area (CSA): A broader grouping that links adjacent CBSAs with demonstrated economic ties. Memphis is not currently part of a designated CSA.
  2. Urban Area: The Census Bureau's urbanized area boundary, which follows physical development density rather than county lines. The Memphis urbanized area is smaller than the MSA because it excludes rural portions of the outlying counties.
  3. Primary Metropolitan Statistical Area (PMSA): A legacy designation retired after the 2000 standards revision; no longer used in federal statistical publications.

The Memphis Metro Area Overview provides a geographic orientation to these nested boundaries.

Tradeoffs and Tensions

The MSA boundary introduces measurable analytical tensions that affect how policymakers, researchers, and journalists interpret Memphis-area data.

Cross-state governance fragmentation. The MSA spans jurisdictions governed by Tennessee, Mississippi, and Arkansas — three states with different income tax structures, education funding formulas, and public health regulatory frameworks. No single state agency has jurisdiction over the full MSA, and no regional government body holds authority across all 10 counties. This means the MSA is primarily a statistical unit, not an administrative one. Regional planning efforts must be coordinated voluntarily through entities like the Memphis Urban Area Metropolitan Planning Organization, which itself operates under federally mandated transportation planning requirements (23 U.S.C. § 134).

Boundary revision disrupts longitudinal data. OMB updates CBSA delineations after each decennial census. When counties are added or removed, time-series comparisons of economic indicators break unless researchers explicitly adjust for the boundary change. The 2013 revision, for example, altered the composition of multiple MSAs nationwide, requiring the Bureau of Labor Statistics to restate historical employment series.

Inclusion thresholds obscure internal variation. A county that barely meets the 25 percent commuting threshold is treated identically to one where 60 percent of residents commute to the core. Tunica County, Mississippi — historically one of the poorest counties in the United States — is aggregated with DeSoto County, Mississippi, which has median household incomes substantially above the MSA average. This aggregation can mask poverty concentration. The Memphis Metro Poverty Rate page disaggregates these figures at the county level.

Common Misconceptions

Misconception: The Memphis MSA and the City of Memphis are the same thing.
The City of Memphis is a single municipality within Shelby County, Tennessee. The MSA covers 10 counties across 3 states. In population terms, the City of Memphis accounts for roughly 60 percent of Shelby County's population but less than 40 percent of the full MSA's population. Conflating the two produces substantial errors in per-capita statistics. The Memphis Metro vs. City of Memphis page addresses this distinction directly.

Misconception: MSA boundaries reflect metropolitan growth and are updated continuously.
OMB reviews and updates CBSA delineations on a periodic schedule tied to decennial census data and commuting surveys from the American Community Survey. Boundaries are not adjusted annually to reflect population growth or suburban expansion. A rapidly growing county may not be added to an MSA until the next scheduled review cycle.

Misconception: All federal funding formulas use the MSA boundary.
Federal grant programs use different geographic units depending on the program. Community Development Block Grant (CDBG) allocations use entitlement community designations based on population thresholds within specific jurisdictions. Medicaid matching rates are set at the state level. The MSA boundary is directly used by programs that explicitly cite CBSA designations in their allocation formulas, such as the Department of Housing and Urban Development's fair market rent determinations (HUD FMR Documentation).

Misconception: The Memphis MSA includes the full Memphis media market.
Television and radio market boundaries (Nielsen Designated Market Areas) are set by private audience measurement companies and do not follow OMB delineations. The Memphis DMA extends into portions of Tennessee, Mississippi, and Arkansas that fall outside the MSA's commuting-based boundary.

For more context on how federal funding flows to the region, see Memphis Metro Federal Funding.

Checklist or Steps

Elements verified when determining whether a county is part of the Memphis MSA:

The authoritative resource for this determination process is the OMB CBSA Delineation Files published by the U.S. Census Bureau.

Reference Table or Matrix

Memphis MSA County Composition and Key Characteristics

County State Role in MSA Approx. Population (2020 Census) Notes
Shelby Tennessee Core county 929,744 Contains City of Memphis; principal city anchor
DeSoto Mississippi Outlying 184,945 Fastest-growing county in MSA; border with Shelby Co.
Fayette Tennessee Outlying 42,273 East of Shelby; rural-suburban character
Tipton Tennessee Outlying 61,873 North of Shelby; agricultural and residential
Crittenden Arkansas Outlying 47,955 West Bank of Mississippi River; West Memphis, AR
Marshall Mississippi Outlying 36,727 South of Shelby; mixed rural/industrial
Tate Mississippi Outlying 28,321 South of DeSoto; lower commuting integration
Benton Mississippi Outlying 8,162 Southernmost MSA county; lowest population
Tunica Mississippi Outlying 9,632 Southwest; historically high poverty concentration
Hardeman Tennessee Outlying 25,050 Added/adjusted per most recent delineation cycle

Population figures drawn from the 2020 U.S. Decennial Census (Census Bureau). County inclusion verified against OMB Bulletin 23-01.

The Memphis Metro Statistical Area reference page provides extended tabular data on economic and demographic indicators at the MSA level. For a starting point in navigating all Memphis Metro reference resources, the site index maps the full structure of available reference pages.

References

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