In 2006, delegations comprised of 748 international dignitaries representing 78 countries made official visits to the California Senate. The countries, ranked by number of visitors, were as follows: | |||
| COUNTRY | # VISITORS | COUNTRY | # VISITORS |
| CHINA | 163 | ITALY | 2 |
| EGYPT | 64 | LITHUANIA | 2 |
| JAPAN | 56 | MACEDONIA | 2 |
| DENMARK | 53 | MALDIVES | 2 |
| RUSSIA | 41 | MONGOLIA | 2 |
| FRANCE | 28 | NEPAL | 2 |
| GERMANY | 28 | PERU | 2 |
| UNITED KINGDOM | 25 | ROMANIA | 2 |
| MEXICO | 22 | SLOVENIA | 2 |
| PORTUGAL | 19 | SRI LANKA | 2 |
| AFGHANISTAN | 17 | SWEDEN | 2 |
| TURKEY | 17 | THAILAND | 2 |
| BULGARIA | 15 | TUNISIA | 2 |
| SPAIN | 15 | AUSTRIA | 1 |
| GREECE | 10 | BAHRAIN | 1 |
| PAKISTAN | 10 | BANGLADESH | 1 |
| AZERBAIJAN | 9 | BARBADOS | 1 |
| CZECH REPUBLIC | 9 | BURUNDI | 1 |
| TAJIKISTAN | 9 | ECUADOR | 1 |
| BRAZIL | 8 | ETHIOPIA | 1 |
| JORDAN | 8 | FIJI | 1 |
| KENYA | 7 | GUATEMALA | 1 |
| SOUTH KOREA | 7 | GUINEA | 1 |
| SLOVAKIA | 6 | INDIA | 1 |
| BOSNIA AND HERZEGOVINA | 5 | INDONESIA | 1 |
| SERBIA | 5 | KAZAKHSTAN | 1 |
| VIETNAM | 5 | LUXEMBOURG | 1 |
| UKRAINE | 5 | MADAGASCAR | 1 |
| CANADA | 4 | MOZAMBIQUE | 1 |
| BELGIUM | 3 | NETHERLANDS | 1 |
| CROATIA | 3 | NEW ZEALAND | 1 |
| HUNGARY | 3 | NICARAGUA | 1 |
| ISRAEL | 3 | OMAN | 1 |
| KYRGYZSTAN | 3 | PHILIPPINES | 1 |
| UZBEKISTAN | 3 | SIERRA LEONE | 1 |
| ALBANIA | 2 | SOUTH AFRICA | 1 |
| CHILE | 2 | TANZANIA | 1 |
| FINLAND | 2 | VENEZUELA | 1 |
| IRELAND | 2 | YEMEN | 1 |
The delegations studied a wide range of subjects, which are ranked below according to the number of visitors who studied them: | |||
| SUBJECT | # VISITORS | SUBJECT | # VISITORS |
| Legislative Process and Government | 313 | Natural Resources/Water | 45 |
| Environment | 115 | Agriculture | 35 |
| International Relations | 141 | Immigration | 29 |
| California History | 79 | Social | 19 |
| Health | 57 | (Bio) Technology | 17 |
| Education | 56 | Transportation | 14 |
| Budget/Fiscal | 54 | Energy | 9 |
| Int'l trade/economic development | 47 | Media Relations | 9 |
Note: As some delegations studied more than one subject, the subject area numbers will not coincide with the number of visitors.