Latics were unable to take all three points at Boundary Park despite having the better of play for the majority of the game.
Latics got off to a flying start as Jonny Smith gave the hosts the lead in the second minute. Smith came in from his right-wing position, racing away from the Orient defence before executing a brilliant controlled effort into the bottom corner of Sam Sargeant’s goal.
Orient came into the game more after the 20-minute mark and Jordan Maguire-Drew tested Zeus De La Paz in the 22nd minute, with an effort from the edge of the box with De La Paz making a comfortable save.
However, he was unable to deny the Orient frontman three minutes later; Lee Angol got down the byline on the right-hand side, he put in a dangerous low cross that Maguire-Drew converted at the second time of asking to level the scoring.
Maguire-Drew could have put his side in the lead in the 39th minute when he found some space to get a shot off but he dragged his effort wide of the goal.
Jamie Stott had an effort from distance in stoppage time at the end of the first half which Sargeant did well to save meaning that the sides went into the break level.
It was the visitors that had the first chance of the second half, the ball fell loose to Conor Wilkinson who’s shot was deflected narrowly wide of the post.
Goalscorer Smith was the man who looked most likely doing something for Oldham and he again tested the O’s keeper in the 53rd minute. He drove with the ball before eventually cutting inside and firing off a shot that Sargeant was equal to.
Latics started to become the dominant side at Boundary Park and just before the hour mark Zak Mills had a chance but his shot was blocked.
David Jones could have had his debut goal in the 62nd minute, Jean-Louis Akpa Akpro held the ball up well and teed Jones off but his effort lacked any real power and it was an easy stop for the Orient goalkeeper.
Latics felt aggrieved when Daniel Happe, who appeared to be the last man, was shown a yellow card for bringing down Akpa Akpro as he charged towards the Orient goal in the 76th minute.
Latics continued to push for a winning goal and substitute Filipe Morais almost gave them the lead in the 82nd minute, his long range effort flew just wide of the goal and in the 89th minute Jones almost capped off his debut in style, his free kick from the edge of the box smashed into the post.
Latics continued to push for a goal that would give them the win but Leyton Orient held firm to take a point back down South.
Full Time Score: Oldham Athletic 1-1 Leyton Orient.
Attendance: 3121 (352 away).
Line ups -
Oldham Athletic: De La Paz, Mills, Iacovitti (68, Morais), Stott, Wilson (66, Maouche), Jones, McCann, Smith, Akpa-Akpro (80, Segbe Azankpo), Wheater ©, Hamer.
Substitutes: Woods, Morais, Maouche, Fage, Segbe Azankpo, Sylla, Egert.
Leyton Orient: Sargeant, Ling, Widdowson ©, Wilkinson (73, Harrold), Maguire-Drew (63, Brophy), Happe, Angol (81, Dayton), Marsh, Turley, Kyprianou, Wright.
Substitutes: Brill, Gorman, Ekpiteta, Coulson, Dayton, Brophy, Harrold.