The resignation of Sarah Palin as Governor of Alaska, after 2.5 years of her 4-year term, was announced on July 3, 2009 and became effective on July 26. Lieutenant Governor Sean Parnell succeeded Sarah Palin as Governor.  Parnell was later elected to a full term, in November 2010.
Palin announced she was resigning her office due to the costs and distractions of battling ethics investigations describing the "insane" amount of time and money that both she and the state of Alaska had expended responding to "frivolous" legal ethics complaints filed against her.     She said the state had spent $2 million while she and her husband, Todd, would be spending "more than half a million dollars in legal bills in order to set the record straight."  
On December 22, 2010, new rules governing Alaska executive branch ethics, stemming from Sarah Palin's tenure as governor, took effect: 
These include allowing for the state to pay legal costs for officials cleared of ethics violations; allowing for a family member of the governor or lieutenant governor to travel at state cost in certain circumstances and allowing an immediate family member to use an official's state-issued cell phone or BlackBerry if the usage is limited or under monthly or unlimited plans. 
- "Palin stepping down this month". CNN. July 3, 2009. Retrieved January 12, 2010.
- Cockerham, Sean (7 July 2009). "Palin says ethics investigations were paralyzing, Interview: Governor says she resigned because of frivolous complaints". Anchorage Daily News. Archived from the original on 11 July 2009. Retrieved 15 December 2010.
- "Legal Bills Swayed Palin, Official Says". The New York Times. 5 July 2009.
- "Palin's Reasons for Stepping Down". Washington Post. 3 July 2009. Retrieved 12 January 2010.
- Ball, Molly (10 June 2011). "Sarah Palin emails provide no big bombshells". Politico. p. 2. Retrieved 14 March 2014.
- "Sarah Palin's Governorship In Part Prompted New Ethics Rules Set To Take Effect In Alaska". Huffington Post. 8 December 2010.
- Cockerham, Sean (8 July 2009). "Palin defends 'millions' ethics price claim, Tally: Record requests, ethics complaints, lawsuits, troopergate given price tag". Anchorage Daily News. Archived from the original on 7 September 2009. Retrieved 15 December 2010.
- "New ethics rules to take effect Dec. 22". juneauempire.com.
- Video of Alaska Governor Transfer of Power Ceremony (Sarah Palin "farewell speech" at 6:00min) C-SPAN.org 2009-07-26. Accessed 2010-12-16.
- Text of Sarah Palin's farewell speech, July 27, 2009, Huffington Post.