LexisNexis Legal - Includes federal and state laws (aka codes). Click on "Federal and State Codes" link. Then, in the sources drop-down box select state or U.S. codes.
LexisNexis State - Includes state bills, statutes, regulation, issues, National Council of State Legislatures briefs, reports, and magazines.
For municipal codes and ordinances, most of these are available on individual city/county web sites. Municode has the largest list of municipal codes online freely available.