O-58 designation replaced by L-3 designation in April 1942
- YO-58 — Four aircraft with a 65 hp (48 kW) Continental YO-170-3 engine.
- O-58 / L-3 — production order of 50, most used for training in the US.
- O-58A / L-3A — Fuselage widened four inches and extended greenhouse canopy. 20 built.
- O-58B / L-3B — Modified canopy and additional radio equipment. 875 built.
- O-58C / L-3C — As O-58B/L-3B but with radio equipment removed for use as trainer. 490 built.
- L-3D — Aeronca 65TF Defender. 11 aircraft impressed.
- L-3E — Aeronca 65TC Defender. 12 aircraft impressed. Continental engine.
- L-3F — Aeronca 65CA Defender. 19 aircraft impressed.
- L-3G — Aeronca 65L Super Chief with side by side seating. 4 aircraft impressed. Lycoming engine.
- L-3H — Aeronca 65TL Defender. 1 aircraft impressed) Lycoming engine.
- L-3J — Aeronca 65TC Defender 1 additional aircraft impressed. Continental engine.
- JR-1 — Three L-3Cs supplied to the US Navy.
- TG-5 — 250 were built as training gliders for the USAAC.
- TG-33 — TG-5 converted for prone pilot.
- LNR — Three TG-5s supplied to the US Navy.