Crescent Oak Apartments in San Marcos, TX offer modern amenities at an affordable price. Choose from apartment style homes or townhomes with one and two bedroom layouts. You'll enjoy the pool or the view from your private patio. Crescent Oak Apartments in San Marcos, TX offer modern amenities at an affordable price. Choose from apartment style homes or townhomes with one and two bedroom layouts. You'll enjoy the pool or the view from your private patio. Crescent Oak Apartments in San Marcos, TX offer modern amenities at an affordable price. Choose from apartment style homes or townhomes with one and two bedroom layouts. You'll enjoy the pool or the view from your private patio.