A total of 1,456 fans attended the game in the Techflow Marine Senior Cup, which the EVO-STIK League East Division leaders won 2-0 to progress to the final.
The final will be played at St James' Park, the home of Newcastle United, against North Shields.
Chairman Ken Beattie said: "It was fantastic to see such a big crowd backing us.
"We have worked hard to draw attention to the club amongst the local community and they have responded magnificently.
"We're delighted to have won and delivered a cup final at St James' Park for our fans."
The attendance broke the previous club record by 200.