Category 1 can refer to:

• Category 1 cable, an electrical standard for communications wiring
• Category 1 tropical cyclone, on any of the Tropical cyclone scales
• Category 1 pandemic, on the Pandemic Severity Index, an American influenza pandemic with a case-fatality ratio of less than 0.1%
• Category 1 winter storm, on the Northeast Snowfall Impact Scale and the Regional Snowfall Index
  • Any of several winter storms listed at list of Northeast Snowfall Impact Scale winter storms
• Category 01 non-silicate mineral - native element minerals

See also[edit]

• Class 1 (disambiguation) - class/category equivalence (for labeling)
• Type 1 (disambiguation) - type/category equivalence (for labeling)
• Group 1 (disambiguation) - group/category equivalence (for labeling)
• Category I (disambiguation) - Roman/Arabic numbering equivalence