First published in 1857, the Texas Almanac has a long history of chronicling the Lone Star State and its residents. The Almanac's 66th edition is printed in full color and includes hundreds of photographs from every region of the state. Color maps of the state and each of its 254 counties show relief, major and minor roads, waterways, parks, and other attractions. Each county map is accompanied by a profile outlining that county's history, physical features, recreation, population, and economy.

Special features in the 66th Edition include:
- An article on the birth of the Austin music scene and the influence on it by legendary musician Willie Nelson, written by Nelson biographer Joe Nick Patoski. The Austin music scene is recognized worldwide through Austin City Limits, the longest running music program on American television.
- A history of the Civil War in Texas to mark the 150th year since the beginning of that conflict. Composed by Texana writer Mike Cox, the article highlights the unique aspects of the war in Texas, such as the Great Hanging at Gainesville and the Battle of Palmito Ranch.
- Newly released 2010 population figures.
- A complete history of voter turnout in Texas going back to 1866.
- A history of professional football in Texas.
- Comprehensive lists of high school football and basketball championships, Texas Olympians, and Texas Sports Hall of Fame inductees.

The Texas Almanac 2012-2013 includes articles and data about:
- history and government
- population and demographics
- the natural environment
- sports and recreation
- business and transportation
- oil and minerals
- agriculture
- science and health
- education
- culture and the arts
- obituaries of notable Texans
- pronunciation guide to town and county names