Former state Auditor Crit Luallen says she will not run for governor in 2015.
Luallen has been mentioned as a possible Democratic contender as Democratic Gov. Steve Beshear finishes his second term.
In a written statement, Luallen said Thursday she is passionate about Kentucky's future but decided not to run because it was the best decision for her family.
Luallen's decision could open the door for Attorney General Jack Conway, a Luallen ally, to seek the Democratic nomination. Current state Auditor Adam Edelen is also considering running for governor.
Democratic House Speaker Greg Stumbo has asked Democrats to delay their candidacies until after the November elections, in which Alison Lundergan Grimes is running for U.S. Senate and Democrats are trying to keep control of the state House of Representatives.