Embattled Mount Vernon Mayor Ernest Davis faces up to two years behind bars after copping a plea Tuesday to knowingly failing to file federal income tax returns.

Davis, 76, pleaded guilty in White Plains federal court to failing to file a personal income tax return in 2011, when he earned $106,743.

He also admitted never filing a corporate income tax return in 2003 to report proceeds from the sale of a building he owned at 14-16 Sandford Boulevard East in Mount Vernon.

He also didn’t report that sale in his personal tax filings the same year.

Davis, a Democrat, was re-elected mayor in 2011 after previously serving three terms from 1996 to 2007. He has long been a subject of various federal and city Board of Ethics probes.

The Journal News of Westchester previously reported that Davis has been the subject of a Internal Revenue Service and FBI investigation since 2012 with federal agents reviewing charities and businesses he set up and 10 properties he owns in four states.