In 2013, delegations comprised of 1091 international dignitaries representing 118 countries made official visits to the California Senate. The countries, ranked by number of visitors, were as follows: | |||
| COUNTRY | # VISITORS | COUNTRY | # VISITORS |
| CHINA | 516 | CAMBODIA | 2 |
| JAPAN | 53 | COSTA RICA | 2 |
| PAKISTAN | 31 | CZECH REPUBLIC | 2 |
| VIETNAM | 25 | DENMARK | 2 |
| MEXICO | 20 | ECUADOR | 2 |
| AFGHANISTAN | 18 | ETHIOPIA | 2 |
| RUSSIA | 18 | FINLAND | 2 |
| UNITED KINGDOM | 16 | GHANA | 2 |
| AZERBAIJAN | 14 | GREECE | 2 |
| INDONESIA | 14 | MALAYSIA | 2 |
| BRAZIL | 13 | MONGOLIA | 2 |
| IRAQ | 12 | MONTENEGRO | 2 |
| ISRAEL | 12 | NETHERLANDS | 2 |
| TURKEY | 12 | NORWAY | 2 |
| CANADA | 11 | PALESTINIAN TERRITORIES | 2 |
| GABON | 11 | RWANDA | 2 |
| KYRGYSTAN | 11 | SINGAPORE | 2 |
| SOUTH KOREA | 10 | SWAZILAND | 2 |
| GERMANY | 8 | TAJIKISTAN | 2 |
| POLAND | 8 | ALBANIA | 1 |
| SPAIN | 8 | ANDORRA | 1 |
| UKRAINE | 8 | ANGOLA | 1 |
| UNITED ARAB EMIRATES | 8 | ARMENIA | 1 |
| ARGENTINA | 7 | BAHRAIN | 1 |
| FRANCE | 7 | BENIN | 1 |
| KAZAKHSTAN | 7 | BHUTAN | 1 |
| KENYA | 7 | BURKINA FASO | 1 |
| BANGLADESH | 6 | BURMA (MYANMAR) | 1 |
| BELARUS | 6 | BURUNDI | 1 |
| HAITI | 6 | CAMEROON | 1 |
| INDIA | 6 | COTE D'IVOIRE | 1 |
| ITALY | 6 | DJIBOUTI | 1 |
| NIGERIA | 6 | DOMINICAN REPUBLIC | 1 |
| SOUTH AFRICA | 6 | GUYANA | 1 |
| ALGERIA | 5 | KOSOVO | 1 |
| NEPAL | 5 | LAOS | 1 |
| SRI LANKA | 5 | LEBANON | 1 |
| AUSTRALIA | 4 | MACEDONIA | 1 |
| COLOMBIA | 4 | MADAGASCAR | 1 |
| EGYPT | 4 | MALAWI | 1 |
| GEORGIA | 4 | MALI | 1 |
| MOROCCO | 4 | MAURITIUS | 1 |
| PANAMA | 4 | MOLDOVA | 1 |
| SAUDI ARABIA | 4 | NICARAGUA | 1 |
| TUNISIA | 4 | PARAGUAY | 1 |
| AUSTRIA | 3 | PERU | 1 |
| CHILE | 3 | PHILIPPINES | 1 |
| JORDAN | 3 | PORTUGAL | 1 |
| NEW ZEALAND | 3 | ROMANIA | 1 |
| OMAN | 3 | SENEGAL | 1 |
| SERBIA | 3 | SCOTLAND | 1 |
| SWITZERLAND | 3 | SLOVENIA | 1 |
| TANZANIA | 3 | ST. LUCIA | 1 |
| VENEZUELA | 3 | SUDAN | 1 |
| YEMEN | 3 | SURINAME | 1 |
| ZIMBABWE | 3 | SWEDEN | 1 |
| BOLIVIA | 2 | THAILAND | 1 |
| BOSNIA HERZEGOVINA | 2 | TRINIDAD & TOBAGO | 1 |
| BULGARIA | 2 | URUGUAY | 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 | 179 | International Trade/Economic Development | 21 |
| International Relations | 158 | Transportation | 18 |
| Social | 58 | Gender | 10 |
| Agriculture | 52 | Public Safety | 8 |
| Budget/Finance | 47 | Biotechnology | 4 |
| Education | 37 | Health | 4 |
| Environment | 28 | Natural Resources/Water | 1 |
| Energy | 27 | ||
Note: As some delegations studied more than one subject, the subject area numbers will not coincide with the number of visitors. | |||