n.d.: Jack Smith and J. M. Patterson open first retail store in Dallas.
n.d.: Webb's Chapel, first church in the Dallas County, is built.
n.d.: Preston Witt and other Dallas County settlers pursue Indian raiders into a neighboring county, culminating in what has become known as the "Grand Prairie Fight."
Spring: Last wild buffalo in Dallas County killed.
March 30: An act of new Texas state legislature creates Dallas County; Dallas made temporary county seat.
May 12: An act of Texas legislature appoints Bryan commissioner of elections.
May 13: The United States declares war on Mexico.
June: A company of volunteers from Dallas and neighboring counties is mustered into federal service in Austin. After being sent to San Antonio, they participate in an abortive invasion of Mexico led by Col. Wm. S. Harney. Two Dallas men are killed in the raid.
July 13: First county election held in Dallas.
Oct. 7: In first deed recorded in Dallas County, Bryan and wife sell two lots to brother-in-law Henry Harter.
Oct. 13: Bryan and William Baker apply for a license to operate a ferry across the Trinity River.