There are two churches on or close to the Strip that will be holding Midnight Mass:
The Shrine of the Most Holy Redeemer 55 E. Reno Ave. (opposite the Luxor, next to the Tropicana)
Christmas Mass schedule: Sunday Dec. 24, Christmas Eve: 4 pm & midnight
Monday December 25, Christmas Day: 9:30 am & 11:30 am
Guardian Angel Cathedral 302 Cathedral Way (on the east side of the Strip, just north of Wynn Las Vegas)
Christmas Eve Mass schedule:
3 pm, 5 pm, 7 pm, & midnight (concert at 11 pm) Midnight Mass will be celebrated by the Most Reverend Joseph A. Pepe, Bishop of Las Vegas, and will be broadcast as a live telecast on KLAS Channel 8 from 12 am to 1:30 am
Christmas Day:
8 am, 9:30 am, 11 am, & 12:30 pm
The nearest Catholic church to downtown Las Vegas, St. Joan of Arc Catholic Church (315 S. Casino Center Blvd., three blocks south of the Four Queens), will be celebrating Mass at 4 and 6 pm on Christmas Eve, but there will be no Midnight Mass, so the Guardian Angel Cathedral would be your best bet. On Christmas Day, St. Joan of Arc will celebrate Mass at 8 and 10 am, noon, and 5 pm.