According to Sony Music Japan, DAYDREAM by MARIAH CAREY has sold 25,000,000 copies worldwide. The album sold best in United States (11,000,000 copies), Japan (2,202,730 copies) and Canada (700,000 copies).
DAYDREAM certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
|  Australia | 350,000 | 5x Platinum | JUNE 1996 |  Australia Sales: 350,000 Certification / note: 5x Platinum Certification Date / sales as of: JUNE 1996 | 
|  Austria | 25,000 | 1x Gold | 13 October, 1995 |  Austria Sales: 25,000 Certification / note: 1x Gold Certification Date / sales as of: 13 October, 1995 | 
|  Belgium | 50,000 | 1x Platinum |  Belgium Sales: 50,000 Certification / note: 1x Platinum Certification Date / sales as of:  | |
|  Canada | 700,000 | 7x Platinum | 1997 |  Canada Sales: 700,000 Certification / note: 7x Platinum Certification Date / sales as of: 1997 | 
|  France | 600,000 | 2x Platinum | 25 January, 2000 |  France Sales: 600,000 Certification / note: 2x Platinum Certification Date / sales as of: 25 January, 2000 | 
|  Germany | 500,000 | 1x Platinum | 1996 |  Germany Sales: 500,000 Certification / note: 1x Platinum Certification Date / sales as of: 1996 | 
|  Japan | 2,202,730 | 1 Million | October 1995 |  Japan Sales: 2,202,730 Certification / note: 1 Million Certification Date / sales as of: October 1995 | 
|  Latvia | 4,000 | 1x Gold | 1998 |  Latvia Sales: 4,000 Certification / note: 1x Gold Certification Date / sales as of: 1998 | 
|  Netherlands | 100,000 | 1x Platinum | 1995 |  Netherlands Sales: 100,000 Certification / note: 1x Platinum Certification Date / sales as of: 1995 | 
|  New Zealand | 75,000 | 5x Platinum |  New Zealand Sales: 75,000 Certification / note: 5x Platinum Certification Date / sales as of:  | |
|  Norway | 50,000 | 1x Platinum | 1995 |  Norway Sales: 50,000 Certification / note: 1x Platinum Certification Date / sales as of: 1995 | 
|  Poland | 50,000 | 1x Gold | 1997 |  Poland Sales: 50,000 Certification / note: 1x Gold Certification Date / sales as of: 1997 | 
|  Spain | 200,000 | 2x Platinum | 1996 |  Spain Sales: 200,000 Certification / note: 2x Platinum Certification Date / sales as of: 1996 | 
|  Switzerland | 25,000 | 1x Gold | 1995 |  Switzerland Sales: 25,000 Certification / note: 1x Gold Certification Date / sales as of: 1995 | 
|  United Kingdom | 600,000 | 2x Platinum | 1 December, 1995 |  United Kingdom Sales: 600,000 Certification / note: 2x Platinum Certification Date / sales as of: 1 December, 1995 | 
|  United States | 11,000,000 | 11x Platinum | March 27, 2022 |  United States Sales: 11,000,000 Certification / note: 11x Platinum Certification Date / sales as of: March 27, 2022 | 
|  Europe (IFPI) | 3,000,000 | 3x Platinum | 1996 |  Europe (IFPI) Sales: 3,000,000 Certification / note: 3x Platinum Certification Date / sales as of: 1996 | 
| Worldwide sales | 25,000,000 | Sony Music Japan | Total Sales: 25,000,000 Source: Sony Music Japan | 


 
   
  