The Jackets had one last shot, but Dwight Brannon just missed at the buzzer.
Brannon led all scorers with 17 points, Devin Booker had 15 and Darrion Booker added 10 for UCHS.
Darrion Booker had 14 rebounds and Devin Booker had 11. Brannon had seven assists.
James Lowe and Brandon Fleming each scored 10 points for the Wildcats.
Union County led by nine points, 49-40, with 3:56 remaining. Woodmont hit a three, benefited from a charge call and then capitalized when the Jackets missed the front end of a one-and-one twice to make it a one possession game.
The Yellow Jackets finish the season at 16-9.
“Tough loss,” said coach Joe Pitt. “First season of basketball at Union County High School - I thought it was very successful. You're always disapointed with a loss and wish we could have went further, but great season. The kids played well together. I really enjoyed these young men and look forward to working with the young ones in the offseason.”
Woodmont 53, UCHS 51
WHS 6 15 13 19 - 53
UCHS 14 7 19 11 - 51
Woodmont: Bailey 4, Lowe 10, Fleming 10, Swinger 7, Wilson 6, Watson 7, Gamball 2, Rapley 3. Totals: 21 8-14. 3-Points: Lowe, Wilson, Rapley.
UCHS: Stapleton 7, Brannon 17, Smith 2, Devin Booker 15, Darrion Booker 10. Totals: 21 6-11. 3-Points: Brannon 2, Stapleton.