S.1975 - Federal Government - A bill to expand family and medical leave in support of servicemembers with combat-related injuries.

Support for Injured Servicemembers Act - Amends the Family and Medical Leave Act of 1993 to entitle an eligible employee who is the spouse, son, daughter, parent, or next of kin of a covered servicemember to a total of 26 workweeks of leave during a single 12-month period to care for the servicemember.

Defines covered servicemember as a member of the U.S. Armed Forces, including a member of the National Guard or a Reserve, who is undergoing medical treatment, recuperation, or therapy, is otherwise in medical hold or medical holdover status, or is otherwise on the temporary disability retired list, for a serious injury or illness incurred in the line of duty on active duty that may render the member medically unfit to perform his or her duties.

Provides for the substitution of accrued paid vacation, personal, family leave, or medical or sick leave for any part of the 26-week period.

Declares that nothing in this Act shall be construed to limit the availability of such leave during any other 12-month period.

Amends federal civil service law to entitle civilian federal employees to the same leave allowance. Provides for the substitution of accrued paid annual or sick leave for any part of the 26-week period.