Young, 68, won heavy support Tuesday in his home county, Alcorn, but failed to gain ground elsewhere except in Monroe County.
Republican newcomer Trent Kelly, a 12-year Tupelo city prosecutor, unseated Democrat Young by a hefty 40,911 to 36,967, new totals Wednesday showed.
Forty-five-year-old Kelly’s largest margin came in his home county of Lee with more than a 5,000-vote edge.
Young, the district attorney since 1975, saw Kelly nudge him out in Itawamba, Pontotoc, Prentiss and Tishomingo.
The results still may be tweaked by a few post-election night adjustments and absentee ballots.
More than 3,700 voters cast absentee ballots across the District 1 counties, the Mississippi Secretary of State’s office reported Tuesday.
Votes in Monroe and Itawamba counties were in favor of Young, although he lagged slightly in Itawamba.
Young’s recent, notorious prosecution came from those two counties – where coaching icon Dwight Bowling was accused of molesting young boys.
Wednesday, Kelly and Young could not be reached for comment.
Kelly said late Tuesday he’s studying how he will staff the offices, but expects to keep most of the employees.
Four years ago, Young defeated Kelly with a 35,565 to 28,612 vote in the Democratic primary.
This time, Kelly changed to the Republican Party and won with almost the same percentage margin.