Alumni Chapters, Associations and Clubs
| Chapter | Organization Type | City | State/Prov. | Province | Website | Founding Date |
|---|---|---|---|---|---|---|
| Austin Alumni | Alumni Chapter | Austin | TX | Central Texas | austin.alumnisigmachi.org | June 01, 1937 |
| Central Texas Alumni | Alumni Chapter | San Marcos | TX | Central Texas | ||
| Dallas Alumni | Alumni Chapter | Dallas | TX | Northern Texas | dallassigs.org | November 23, 1911 |
| Fort Bend Alumni | Alumni Association | Sugar Land | TX | |||
| Fort Worth Alumni | Alumni Chapter | Ft. Worth | TX | Northern Texas | fortworthigsalumni.org | October 24, 1955 |
| Houston Alumni | Alumni Chapter | Houston | TX | East Texas | houstonsigs.org | September 08, 1930 |
| Katy Area Alumni | Alumni Association | Katy | TX | August 10, 2011 | ||
| Lubbock Alumni | Alumni Chapter | Lubbock | TX | Southwestern | lubbock.alumnisigmachi.org | August 11, 1953 |
| Mid Cities Alumni | Alumni Chapter | Kennedale | TX | Northern Texas | sigmachialumni.org | March 01, 1982 |
| Midland Texas Alumni | Alumni Chapter | Midland | TX | Southwestern | April 14, 1948 | |
| North Texas Alumni | Alumni Chapter | Dallas | TX | Northern Texas | sigmachi.net | October 28, 1987 |
| San Antonio Alumni | Alumni Chapter | Converse | TX | Central Texas | lonestarsigs.com | |
| The Woodlands Alumni | Alumni Chapter | Magnolia | TX | East Texas | woodlandssigs.webs.com | January 29, 2010 |
