Don't taking people's opinions here as fact, since most of the times they're wrong, like how people are saying UCSD is a top 10 when it's ranked 20th (it's still a good grad school though). Rankings aren't everything, but it's still useful to get a list of schools and you can think of the other factors for yourself (cost, location, fields offered, type of school, etc.).
1. Carnegie Mellon University (PA) 4.9
Massachusetts Institute of Technology 4.9
Stanford University (CA) 4.9
University of California?Berkeley 4.9
5. University of Illinois?Urbana-Champaign 4.6
6. Cornell University (NY) 4.5
7. University of Texas?Austin 4.4
University of Washington 4.4
9. Princeton University (NJ) 4.3
10. California Institute of Technology 4.1
University of Wisconsin?Madison 4.1
12. Georgia Institute of Technology 4.0
University of Maryland?College Park 4.0
14. Brown University (RI) 3.9
University of California?Los Angeles 3.9
University of Michigan?Ann Arbor 3.9
17. Rice University (TX) 3.8
University of North Carolina?Chapel Hill 3.8
University of Pennsylvania 3.8
20. Columbia University (NY) 3.7
Duke University (NC) 3.7
Harvard University (MA) 3.7
Purdue University?West Lafayette (IN) 3.7
University of California?San Diego 3.7
25. University of Massachusetts?Amherst 3.6
Yale University (CT) 3.6
27. University of Southern California 3.5
University of Virginia 3.5
29. Johns Hopkins University (MD) 3.3
New York University 3.3
Rutgers State University?New Brunswick (NJ) 3.3
SUNY?Stony Brook 3.3
University of California?Irvine 3.3
University of Utah 3.3
35. Ohio State University 3.2
Penn State University?University Park 3.2
University of Arizona 3.2
University of Chicago 3.2
University of Colorado?Boulder 3.2
University of Minnesota?Twin Cities 3.2
Washington University in St. Louis 3.2
42. Indiana University?Bloomington 3.1
Northwestern University (IL) 3.1
University of California?Davis 3.1
University of Rochester (NY) 3.1
Virginia Tech 3.1
47. Dartmouth College (NH) 3.0
University of Florida 3.0
49. Michigan State University 2.9
North Carolina State University 2.9
Rensselaer Polytechnic Institute (NY) 2.9
Texas A&M University?College Station 2.9
University of California?Santa Barbara 2.9
University of Pittsburgh 2.9
55. Arizona State University 2.7
SUNY?Buffalo 2.7
Syracuse University (NY) 2.7
University of California?Santa Cruz 2.7
University of Illinois?Chicago 2.7
60. Boston University 2.6
Iowa State University 2.6
OGI School of Science & Engineering?Oregon Health & Science U. 2.6
University of Delaware 2.6
University of Iowa 2.6
University of Oregon 2.6
Vanderbilt University (TN) 2.6
67. Case Western Reserve University (OH) 2.5
Northeastern University (MA) 2.5
Oregon State University 2.5
University of Tennessee?Knoxville 2.5