YNG Tower Controller reported an aircraft entered Class D airspace without contacting ATC and landed at Griffin/Sloas (800H) airport which is uncharted. Controller recommended the private airport be added to VFR Sectional Chart to raise awareness of required communication with ATC.

Narrative

Aircraft X was inbound for Runway 23 from the southeast. As I scanned; I noticed an aircraft squawking 1200 west of the YNG Class D airspace travelling eastbound. I reached out to the aircraft prior to them entering controlled airspace. I reached out again as they continued into the Class Delta; not knowing if they would continue eastbound toward the landing traffic. I never received a response. The aircraft landed at a small private grass strip called SLOAS which is located approximately 3 miles west of Youngstown Regional Airport; inside of our Class D airspace. A phone call was made to the airport; but there was no answer. This airport is not charted on the VFR sectional; and I believe this could have led to the cause of an airspace intruder. After speaking to the owner of SLOAS; he was unaware of the situation. He voiced his concern due to multiple efforts in the past to try to have his airport charted on the VFR sectional. He voiced he had been trying for years without success; and was even told that smaller private strips don't receive the priority of other airports. He stated that unless pilots are familiar or have experience flying into SLOAS; there is not a good way to tell if the airport is in controlled airspace or not due to the fact it is not charted. This has happened before in the past; and after speaking to the owner of SLOAS; I believe that an airport within controlled airspace; especially being so close to Youngstown Regional (3 miles) should be charted on a VFR sectional chart. This would lessen the chances of pilots entering controlled airspace without establishing communications. We also have another airport within our Class D airspace (Price Field) three miles to the south that is also not charted on a sectional.