The I-35 Corridor is a group of metropolitan areas in the southern Interior Plains region of the United States. It runs from Laredo, Texas in the south to Kansas City, Missouri in the north roughly along Interstate 35. It also includes the cities of Austin, Dallas, Fort Worth, Oklahoma City, and Wichita. San Antonio is the largest central city and the Dallas-Fort Worth Combined Statistical Area is the largest metropolitan area in the megalopolis.
I-35 Corridor contains five of the largest urban areas and seven of the 50 largest cities in the U.S. With a population of over 15 million residents, it is one of the fastest growing transmetropolitan regions in North America.
The Texas cities contained within the I-35 Corridor are often referred to as a sub-megaregion of their own, often referred to as the Texaplex. It is part of a much larger megaregion called the Texas Triangle.
History of the concept
Comparisons and developments
Compared to other regions such as BosWash and Japan's Pacific Belt, the I-35 Corridor is a looser collection of cities, spread over a large area with much suburban and rural space in between, rather than a continuous urbanized area. One review judges it to be "at best a borderline case" of a megalopolis.
Since Gottmann's original publication, many constituent portions of the corridor have suffered job loss and in some cases diminished populations, in the wake of changes in the U.S. economy and the shift of manufacturing jobs to other portions of the country or overseas.
U.S. Census statistics
|Rank (CSA)||Combined Statistical Area
(or Metropolitan Statistical Area if noted)
|State(s)||2007 Estimate||2000 Population||Percent Change
|22||Kansas City-Overland Park-Kansas City, MO-KS CSA||MO-KS||2,053,928||1,901,070||+8.04%|
|(MSA 28)||San Antonio-New Braunfels, TX MSA||TX||1,990,675||1,711,721||+16.30%|
|(MSA 37)||Austin-Round Rock-San Marcos, TX MSA **||TX||1,598,161||1,249,748||+27.88%|
|34||Oklahoma City-Norman-Shawnee **||OK||1,262,027||1,160,942||+8.71%|
|44||Tulsa-Bartlesville, OK CSA||OK||955,643||908,528||+5.19%|
|56||Wichita-Winfield, KS CSA||KS||630,703||607,457||+3.83%|
|(MSA 131)||Killeen-Temple-Fort Hood, TX MSA||TX||378,935||330,714||+14.58%|
|(MSA 189)||Topeka, KS MSA||KS||228,692||224,551||+1.84%|
|(MSA 190)||Waco, TX MSA||TX||228,123||213,517||+6.84%|
|(MSA 271)||Wichita Falls, TX MSA||TX||148,148||151,524||-2.23%|
|(MSA 343)||Lawton, OK MSA||OK||113,811||114,996||-1.03%|
|(MSA 348)||Lawrence, KS MSA||KS||113,488||99,962||+13.53%|
|(μSA 449)||Stillwater, OK μSA||OK||79,931||68,190||+17.22%|
|(μSA 512)||Hutchinson, KS μSA||KS||63,145||64,790||-2.54%|
|(μSA 549)||Enid, OK μSA||OK||57,657||57,813||-0.27%|
|(μSA 559)||Ardmore, OK μSA||OK||56,694||54,452||+4.12%|
|(μSA 639)||Ponca City, OK μSA||OK||45,638||48,080||-5.08%|
|(μSA 642)||Tahlequah, OK μSA||OK||45,393||42,521||+6.75%|
|(μSA 662)||Duncan, OK μSA||OK||43,322||43,182||+0.32%|
|(μSA 704)||Durant, OK μSA||OK||39,563||36,534||+8.29%|
|(μSA 717)||Emporia, KS μSA||KS||38,863||38,965||-0.26%|
|(μSA 718)||Pittsburg, KS μSA||KS||38,860||38,242||+1.62%|
The table above includes:
- Metropolitan Statistical Areas that are not part of a CSA (see List of United States metropolitan statistical areas by population), based on their MSA ranking (compared to CSA rankings. **For instance, Austin MSA [MSA rank 37] is not part of a CSA but is larger than Oklahoma City CSA [CSA rank 34]; therefore Austin MSA is listed prior to Oklahoma City CSA).
- micropolitan or rural areas (see List of United States micropolitan statistical areas by population),
List of cities
The major cities in the I-35 megalopolis include the following (North to South):
- Kansas City Pop: 459,787
- Review: Tales of cities and megalopolises - 07 July 1990 - New Scientist