Growing up in Pensacola, I began seeing UFOs in the 1970's. But, unlike today, there was almost no way to report these. And, unless you had a huge story like the Pascagoula abduction case reported by Charles Hickson and Calvin Parker in 1973, a simple sighting would most likely be ignored my your local news outlet.
Today however, there is MUFON which stands for the Mutual UFO Network. And, while they have come under fire for hosting Corey Goode and his off-the-charts unprovable claims at their conventions, they also are a great source of UFO knowledge. This is because they have a huge database and trained investigators that are assigned regions in each state.
Nuforc.org is the National UFO Reporting Center. And this website shares their information with MUFON. Also, they have a searchable database. You can list UFO sightings by Event Date, State, Shape of UFO, and Date Posted. This comes in handy if you see something and are trying to find similarities to what you saw.
Nuforc.org is pretty much is run by one man. Peter Davenport is an Air Force veteran and has found a passion in documenting these sightings. And to date, his site is the easiest way to report a UFO. The online report form is extensive and detailed. But, it also allows whomever reports the UFO anonymity. This is done mainly to encourage people who have seen something odd in the sky, but perhaps are wary of speaking about it as they could fear ridicule.
Also, on the MUFON site is a handy interactive UFO map. This uses icons over a map with pop up briefs about different sightings.
Using the map's pop up sighting briefs is a quick way to research an area you live about UFO sightings.