Counterclaims notwithstanding, here is the list. Some may question why So-Cal's SOUTH COAST PLAZA is given such a low-ranking position. Strictly speaking, the two SOUTH COAST malls consist of separate complexes that are not, technically, "under one roof."

IN GREEN = Article on MALL HALL OF FAME site
IN BLUE = Article on SHOPPING MALL MUSEUM site

 Sizes according to Gross Leasable Area

1. MALL OF AMERICA / 1992 / Bloomington, MN / enclosed / 2,942,000 leasable square feet (5,400,000 square feet of floor area)
2. AMERICAN DREAM (MEADOWLANDS) / 2019 / Bergen County, NJ / enclosed / 2,900,000 leasable square feet (4,800,000 square feet of floor area)
3. AVENTURA MALL / 1983 / Aventura, FL / enclosed and open-air / 2,709,500 leasable square feet
4. KING OF PRUSSIA / 1963 / Montgomery County, PA / enclosed / 2,651,600 leasable square feet
5. DEL AMO FASHION CENTER / 1960 / Torrance, CA / enclosed and open-air / 2,608,000 leasable square feet
6. ALA MOANA CENTER / 1959 / Honolulu, HI / open-air / 2,581,100 leasable square feet 
7. THE GALLERIA / 1970 / Houston, TX / enclosed / 2,400,000 leasable square feet
8. SAWGRASS MILLS / 1990 / Sunrise, FL / enclosed and open-air / 2,370,600 leasable square feet
9. ROOSEVELT FIELD MALL / 1956 / Nassau County, NY / enclosed / 2,359,200 leasable square feet 
10. DESTINY USA / 1990 / Syracuse, NY / enclosed / 2,250,000 leasable square feet
11. WOODFIELD MALL / 1971 / Schaumburg, IL / enclosed / 2,224,000 leasable square feet
12. PALISADES CENTER / 1998 / Rockland County, NY / enclosed / 2,217,300 leasable square feet
13. SOUTH COAST PLAZA / 1967 / Costa Mesa, CA / enclosed / 2,212,000 leasable square feet [Does not include GLA of CRYSTAL COURT / SOUTH COAST PLAZA WEST] 
14. WESTFIELD VALLEY FAIR  / 1956 / San Jose and Santa Clara, CA / enclosed / 2,200,000 leasable square feet  
15. WESTFIELD GARDEN STATE PLAZA / 1957 / Paramus, NJ / enclosed / 2,182,900 leasable square feet
16. OAKBROOK CENTER / 1962 / Oak Brook, IL / open-air / 2,090,000 leasable square feet
17. SCOTTSDALE FASHION SQUARE / 1961 / Scottsdale, AZ / 2,080,200 leasable square feet
18. TYSONS CORNER CENTER / 1968 / Fairfax County, VA / enclosed / 1,971,000 leasable square feet 
19. FASHION SHOW LAS VEGAS / 1981 / Clark County, NV / enclosed / 1,878,100 leasable square feet
20. NATICK MALL / 1966 / Natick, MA / enclosed / 1,860,000 leasable square feet