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For more than a century, Armstrong Teasdale has forged long-term relationships with clients large and small around the globe. Since our founding in 1901, we have grown to be one of the 200 largest law firms in the U.S., with offices across the country.


Our attorneys work together to guide clients through virtually every challenge, from day-to-day operational decisions to some of the most complex legal matters.

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Boston, Massachusetts
225 Franklin Street, 26th Floor
Boston, MA 02110
Phone: 617.217.2030
Denver, Colorado
4643 S. Ulster St., Suite 800
Denver, CO 80237
Phone: 720.200.0676
Edwardsville, Illinois
115 N. Second St.
Edwardsville, IL 62025
Phone: 618.800.4141
Jefferson City, Missouri
3405 W. Truman Boulevard, Suite 210
Jefferson City, MO 65109
Phone: 573.636.8394
Kansas City, Missouri
2345 Grand Blvd., Suite 1500
Kansas City, MO 64108
Las Vegas, Nevada
3770 Howard Hughes Parkway, Suite 200
Las Vegas, NV 89169
Phone: 702.678.5070
New York, New York
919 Third Ave., 37th Floor
New York, NY 10022
Phone: 212.209.4400
Philadelphia, Pennsylvania
2005 Market Street
29th Floor, One Commerce Square
Philadelphia, PA 19103
Phone: 267.780.2000
Princeton, New Jersey
100 Overlook Center, Second Floor
Princeton, NJ 08540
Phone: 609.375.2020
Salt Lake City, Utah
201 South Main Street, Suite 2400
Salt Lake City, UT 84111
Phone: 800.243.5070
St. Louis, Missouri
7700 Forsyth Blvd., Suite 1800
St. Louis, MO 63105
Wilmington, Delaware
300 Delaware Avenue, Suite 210
Wilmington, DE 19801
Phone: 302.824.7089
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