1944

• November 20, 1944 – Commissioners' Court passed resolution creating Tarrant County Law Library
• December 1, 1944 – Effective date of Commissioners' Court resolution
• Homa S. Hill, referred to by some as the "Father of the Law Library," became the first Chairman of the Library Committee
  

1945

• May 17, 1945 – George W. Steere chosen as the first Law Librarian
• July 1945 – Law Library's Rules and Regulations adopted by Commissioners' Court
  
• October 1, 1945 – Library officially opened to the public (located in 1895 Courthouse)

1946

• January 1, 1946 – Law Library and Court of Appeals jointly hired a janitor, Sherman Williams, to replace the previous janitor, Israel Batteau, who passed away in December 1945

1948

• George W. Steere passed away
• Gueneth A. Babcock became the second Law Librarian
  

1958

• Law Library and Court of Appeals moved to second floor of old Civil Courts Building
  

1962

• Temporary, acting librarian, Alice Heaton, took over duties in the Law Library during Babcock's illness
  
• Gueneth A. Babcock passed away
• Dell DeHay became the third librarian and the first professional Law Librarian to serve at Tarrant County Law Library
  

1969

• Homa S. Hill ended his service as Chairman of the Library Committee after 25 years

1970

• Robert "Bob" Hobbs selected as Chairman of the Library Committee

1973

• Jerry Hoodenpyle became Chairman of the Library Committee

1974

• Jack C. Wessler became the Chairman of the Library Committee
  

1975

• Frances Perry hired as Assistant Librarian

1977

• April 23, 1977 – Jane G. Olm conducted an independent review of the Tarrant County Law Library and gave high praises to it and Librarian Dell DeHay
  

1979

• Commissioners' Court officially changed the library's name to Dell DeHay Law Library of Tarrant County in honor of her many years of service
  
• Dell DeHay passed away
• Frances Perry became the fourth Law Librarian
  

1981

• Law Library opened two branch libraries at Tarrant County (Junior) College Northeast campus and University of Texas at Arlington
  

1982

• Sharon Wayland hired as Assistant Librarian

1983

• December 3, 1983 – Law Library moved back to newly renovated 1895 Courthouse

1985

• Smoking banned in Law Library

1988

• Jack C. Wessler announced he would step down as Chairman of the Library Committee after 14 years
  
• Wallace Craig named Chairman of the Library Committee
• Peggy Martindale hired as Assistant Librarian for Public Services
  

1989

• December 1989 – Frances Perry retired from Law Librarian position, but stayed on part-time

1990

• Sharon Wayland became fifth Director of Law Library (head of library no longer referred to as Law Librarian)

1991

• Sharon Wayland and Peggy Martindale helped found Tarrant County Association of Law Libraries
  
• Law Library's phone system upgraded and current telephone numbers assigned
  

1997

• Judge Michael Schattman named Chairman of the Library Committee

1999

• Richard Bourland and Dennis Sheehan named as joint Chairmen of the Library Committee
• November 1, 1999 – Law Library no longer open on Saturdays
  

2000

• Tarrant County Bar Association passed resolution in opposition to Law Library's merger with Texas Wesleyan School of Law Library

2005

• Law Library adopted new Library Advisory Committee with Commissioners' Court approval

2006

• Judge David Evans named Chairman of Library Advisory Committee

2008

• Law Library officially closed its two branch libraries

2009

• Frances Perry retired

2013

• Sharon Wayland retired
• Holly Gerber became the sixth Director of the Law Library
• Old Civil Courts Building demolished
  

2019

• Cara Sitton became the seventh Director of Law Library

2020

• December 15, 2020 - Commissioners' Court passed resolution honoring Peggy Martindale for over 34 years of service.
• Peggy Martindale retired
  

2021

• Amanda Hill hired as Assistant Director
  

2022

• Renovation of Law Library reference desk