| Scientific name | Authorship | Rank | Status | Images | |
|---|---|---|---|---|---|
| Phyllonorycter obscuricostella | (Clemens, 1859) | species | Accepted | ||
| Phyllonorycter obsoleta | (Frey & Boll, 1873) | species | Accepted | ||
| Phyllonorycter obsoletella | (Chambers, 1878) | species | Synonym | ||
| Phyllonorycter obtusifoliella | Deschka, 1974 | species | Accepted | ||
| Phyllonorycter obumbrata | (Sorhagen, 1900) | species | Synonym | ||
| Phyllonorycter occitanica | (Frey & Boll, 1876) | species | Accepted | ||
| Phyllonorycter ochreojunctella | (Klimesch, 1942) | species | Accepted | ||
| Phyllonorycter ocimellus | De Prins, 2012 | species | Accepted | ||
| Phyllonorycter olivaeformis | (Braun, 1908) | species | Accepted | ||
| Phyllonorycter oliviformis | (Meyrick, 1912) | species | Synonym | ||
| Phyllonorycter ololua | De Prins, 2012 | species | Accepted | ||
| Phyllonorycter olympica | Deschka, 1983 | species | Accepted | ||
| Phyllonorycter ontario | (Freeman, 1970) | species | Synonym | ||
| Phyllonorycter oreas | Kumata, 1973 | species | Accepted | ||
| Phyllonorycter oregonensis | (Walsingham, 1889) | species | Accepted | ||
| Phyllonorycter orientalis | (Kumata, 1963) | species | Accepted | ||
| Phyllonorycter ostryae | (Kumata, 1963) | species | Accepted | ||
| Phyllonorycter ostryaefoliella | (Clemens, 1859) | species | Accepted | ||
| Phyllonorycter ostryifoliella | (Meyrick, 1912) | species | Synonym | ||
| Phyllonorycter ovalifoliae | Kumata, 1973 | species | Accepted | ||
| Phyllonorycter oxyacanthae | (Frey, 1855) | species | Accepted | ||
| Phyllonorycter oxycanthae | (Razowski & Palik, 1969) | species | Misapplied | ||
| Phyllonorycter oxygrapta | (Meyrick, 1915) | species | Accepted | ||
| Phyllonorycter padella | (Glitz, 1863) | species | Synonym | ||
| Phyllonorycter paduella | (Tutt, 1898) | species | Synonym |
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