The Nassau Fire Marshal's Office says 200 to 300 people packed the Bayville Scream Park on Saturday night.
Officials cited the owner for violating social distancing guidelines.
RELATED | Many spotted without masks after 10K-person wedding scaled down after enforcement
They say the park was fine inside, where people went into the attractions, but it was the line to get into the park that was the problem. It was moving too slowly and attracted a big crowd.
Assistant chief Michael Uttaro said fire officials had to return the next day as well because of complaints and told the owner if they have to come again they will be shut down.
Officials with the theme park did not have a comment.
MORE NEWS: Watch Eyewitness to a Pandemic
Episode 3: New York on Pause
RELATED: New York, New Jersey, Connecticut out-of-state travelers quarantine list
MORE CORONAVIRUS COVID-19 COVERAGE
Back to school information
How coronavirus changed the New York region
Do you have coronavirus symptoms?
What's Open, What's Closed in the Tri-State area
COVID-19 Help, Information. Stimulus and Business Updates
UPDATES
New York City
New Jersey
Long Island
Westchester and Hudson Valley
Connecticut
abc7NY Phase Tracker: