Osornolobus is a genus of Chilean araneomorph spiders in the family Orsolobidae, and was first described by Raymond Robert Forster & Norman I. Platnick in 1985.

Species it contains seventeen species, found only in Chile: Osornolobus anticura Forster & Platnick, 1985 – Chile Osornolobus antillanca Forster & Platnick, 1985 – Chile Osornolobus canan Forster & Platnick, 1985 (type) – Chile Osornolobus cautin Forster & Platnick, 1985 – Chile Osornolobus cekalovici Forster & Platnick, 1985 – Chile Osornolobus chaiten Forster & Platnick, 1985 – Chile Osornolobus chapo Forster & Platnick, 1985 – Chile Osornolobus chiloe Forster & Platnick, 1985 – Chile Osornolobus concepcion Forster & Platnick, 1985 – Chile Osornolobus correntoso Forster & Platnick, 1985 – Chile Osornolobus magallanes Forster & Platnick, 1985 – Chile Osornolobus malalcahuello Forster & Platnick, 1985 – Chile Osornolobus nahuelbuta Forster & Platnick, 1985 – Chile Osornolobus newtoni Forster & Platnick, 1985 – Chile Osornolobus penai Forster & Platnick, 1985 – Chile Osornolobus thayerae Forster & Platnick, 1985 – Chile Osornolobus trancas Forster & Platnick, 1985 – Chile

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