Is there a train from Casablanca airport?

Yes, and it is one of the most useful facts about arriving in Morocco: Casablanca Mohammed V is the only airport in the country with a railway station built right into it. You will find the ONCF station downstairs from the arrivals level — follow the train symbols — with ticket machines and a counter on the platform concourse. No other Moroccan airport has this, which is exactly why I tell so many guests to fly into Casablanca and then simply walk to a train.

The trains run frequently, roughly hourly, into Casablanca itself — to Casa-Voyageurs, the big long-distance station, and to Casa-Port near the old medina and port — taking about 30 to 45 minutes. That alone makes reaching the city cheap and traffic-free. But the real magic is the connections: from Casa-Voyageurs you link onto the national network, north to Rabat (and on by high-speed Al Boraq to Tangier) or, the route most visitors want, south to Marrakech.

For Marrakech specifically, there is effectively a direct path from the airport — you board at the airport station and, usually with one easy signed change at Casa-Voyageurs, you are on the Marrakech service, arriving in roughly three hours total. It means you can land at Casablanca and be in Marrakech the same afternoon without ever stepping into Casablanca city or hiring a car. Comfortable, predictable, and you watch the landscape go by; I route a lot of arriving guests this way.

My practical notes: have some dirham cash, as the ticket machines and counters are easiest with local currency, and buy first class if you want a guaranteed comfortable seat with your luggage on a busy service — it is still inexpensive. Check the live departure board for the next train into the city versus the Marrakech connection, give yourself a little buffer after immigration before counting on a specific departure, and keep your ticket until you exit, as you may need it at the barriers.