Mike Jones was crowned county singles champion after a surprise 7,540-4,540 win against Dave Tooke in the final at Gladiators Club.
Jones set up a showdown with Tooke after beating Ian Moss 7,540-5,960 in the semis.
Tooke booked his place with a 4,540-4,110 success against John Bamsey.
Pauline Withey was crowned ladies champion after beating Sue Atkins 7,700-4,570 in the final.
Withey beat Mel Standbridge 10,980-7,520 over two legs in the semi-finals.
Jones and Withey will represent Oxfordshire in the nationals singles at Reading later in the year.
Eynsham A reached the last eight of the Inter Area Cup with a thrilling aggregate win against Oxford Ladies.
In the first leg, Oxford won 3-2 at Didcot Con Club with Pauline Withey, Jenny Florey and Sue Atkins their winners.
However, in the second leg, at Vikings Club, Eynsham stormed into a 2-0 lead thanks to wins from Bob Allsworth and Ian Moss (10,400) to make it 4-3 on aggregate.
Mel Standbridge then beat Dave Bartlett and Sue Atkins accounted for Sean Stratford to give Oxford a 5-4 lead.
Mick Jones (8,480) levelled it up, but Eynsham progressed 50,120-28,370 on aggregate.
They now face Oxford A who overcame Eynsham B 8-2.
Oxford C beat Wallingford D 6-4 on aggregate. They also drew 5-5 with Reading in the Inter-Area C Competition.
l THE Oxford Bar Billiards Association hold their annual meeting tonight (8pm) at the Gladiators Club.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here