I-35 Corridor

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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.[1]

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[edit]

The term was coined in the 1961 book Megalopolis: The Urbanized Northeastern Seaboard of the United States by French geographer Jean Gottmann.

In 1965, Herman Kahn speculated about the future of the three megalopolises in the year 2000,[2] referring to their names as "half-frivolous" and not mentioning Gottman.

Comparisons and developments[edit]

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.[3]

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[edit]

Rank (CSA) Combined Statistical Area
(or Metropolitan Statistical Area if noted)
State(s) 2007 Estimate 2000 Population Percent Change
4 Dallas-Fort Worth TX 06,498,410 05,487,956 A011+18.41%
22 Kansas City-Overland Park-Kansas City, MO-KS CSA MO-KS 02,053,928 01,901,070 A042+8.04%
(MSA 28) San Antonio-New Braunfels, TX MSA TX 01,990,675 01,711,721 A088+16.30%
(MSA 37) Austin-Round Rock-San Marcos, TX MSA ** TX 01,598,161 01,249,748 A018+27.88%
34 Oklahoma City-Norman-Shawnee ** OK 01,262,027 01,160,942 A034+8.71%
44 Tulsa-Bartlesville, OK CSA OK 00,955,643 00,908,528 A063+5.19%
56 Wichita-Winfield, KS CSA KS 00,630,703 00,607,457 A075+3.83%
(MSA 131) Killeen-Temple-Fort Hood, TX MSA TX 00,378,935 00,330,714 A075+14.58%
(MSA 189) Topeka, KS MSA KS 00,228,692 00,224,551 A560+1.84%
(MSA 190) Waco, TX MSA TX 00,228,123 00,213,517 A299+6.84%
(MSA 271) Wichita Falls, TX MSA TX 00,148,148 00,151,524 A788-2.23%
(MSA 343) Lawton, OK MSA OK 00,113,811 00,114,996 A730-1.03%
(MSA 348) Lawrence, KS MSA KS 00,113,488 99,962 A117+13.53%
(μSA 449) Stillwater, OK μSA OK 79,931 68,190 A078+17.22%
(μSA 512) Hutchinson, KS μSA KS 63,145 64,790 A805-2.54%
(μSA 549) Enid, OK μSA OK 57,657 57,813 A691-0.27%
(μSA 559) Ardmore, OK μSA OK 56,694 54,452 A426+4.12%
(μSA 639) Ponca City, OK μSA OK 45,638 48,080 A890-5.08%
(μSA 642) Tahlequah, OK μSA OK 45,393 42,521 A304+6.75%
(μSA 662) Duncan, OK μSA OK 43,322 43,182 A645+0.32%
(μSA 704) Durant, OK μSA OK 39,563 36,534 A239+8.29%
(μSA 717) Emporia, KS μSA KS 38,863 38,965 A690-0.26% ZZZ
(μSA 718) Pittsburg, KS μSA KS 38,860 38,242 A578+1.62%

The table above includes:

List of cities[edit]

The major cities in the I-35 megalopolis include the following (North to South):


  1. ^ MegaCensusReport.indd
  2. ^ http://books.google.com/books?id=sxb2iYN20u4C&pg=PA87&lpg=PA87&dq=chipitts&source=web&ots=97uGYdoc2K&sig=7ztVxWfIG5EBxODs2dmNd9HLgfE&hl=en#PPA87,M1
  3. ^ Review: Tales of cities and megalopolises - 07 July 1990 - New Scientist