In 2010, delegations comprised of 1341 international dignitaries representing 110 countries made official visits to the California Senate. The countries, ranked by number of visitors, were as follows: | |||
| COUNTRY | # VISITORS | COUNTRY | # VISITORS |
| CHINA | 744 | BOTSWANA | 2 |
| VIETNAM | 48 | BURKINA FASO | 2 |
| JAPAN | 40 | BURMA | 2 |
| DENMARK | 30 | COTE D'IVOIRE | 2 |
| THAILAND | 21 | INDONESIA | 2 |
| BRAZIL | 20 | KENYA | 2 |
| MEXICO | 19 | MADAGASCAR | 2 |
| PAKISTAN | 19 | MALI | 2 |
| INDIA | 17 | NIGER | 2 |
| NORWAY | 17 | NIGERIA | 2 |
| RUSSIA | 15 | OMAN | 2 |
| SOUTH AFRICA | 13 | SRI LANKA | 2 |
| ISRAEL | 12 | SWAZILAND | 2 |
| LEBANON | 12 | TANZANIA | 2 |
| SAUDI ARABIA | 12 | TUNISIA | 2 |
| UKRAINE | 12 | VENEZUELA | 2 |
| IRAQ | 11 | ALGERIA | 1 |
| AZERBAIJAN | 10 | ANGOLA | 1 |
| SOUTH KOREA | 10 | BAHRAIN | 1 |
| ARGENTINA | 9 | BURUNDI | 1 |
| GERMANY | 9 | CENTRAL AFRICA REPUBLIC | 1 |
| MALAYSIA | 9 | CHAD | 1 |
| PALESTINIAN TERRITORIES | 9 | COLOMBIA | 1 |
| CANADA | 8 | DEMOCRATIC REPUBLIC OF THE CONGO | 1 |
| JORDAN | 8 | DJIBOUTI | 1 |
| PERU | 8 | ECUADOR | 1 |
| CHILE | 7 | ETHIOPIA | 1 |
| MOROCCO | 7 | GABON | 1 |
| AUSTRALIA | 6 | GUATEMALA | 1 |
| BANGLADESH | 6 | GUINEA | 1 |
| EGYPT | 6 | HUNGARY | 1 |
| ITALY | 6 | JAMAICA | 1 |
| PHILIPPINES | 6 | KAZAKHSTAN | 1 |
| UNITED KINGDOM | 6 | KOSOVO | 1 |
| CAMEROON | 5 | KYRGYZSTAN | 1 |
| FRANCE | 5 | LUXEMBOURG | 1 |
| SPAIN | 5 | MACEDONIA | 1 |
| SUDAN | 5 | MALAWI | 1 |
| AFGHANISTAN | 4 | MAURITANIA | 1 |
| BULGARIA | 4 | NEPAL | 1 |
| CAMBODIA | 4 | NICARAGUA | 1 |
| EUROPEAN UNION | 4 | ROMANIA | 1 |
| GHANA | 4 | RWANDA | 1 |
| LAOS | 4 | SENEGAL | 1 |
| PUERTO RICO | 4 | SERBIA | 1 |
| YEMEN | 4 | SLOVAK REPUBLIC | 1 |
| KUWAIT | 3 | SOMALIA | 1 |
| MONGOLIA | 3 | SURINAME | 1 |
| NAMIBIA | 3 | SWEDEN | 1 |
| PARAGUAY | 3 | TIMOR-LESTE | 1 |
| POLAND | 3 | UGANDA | 1 |
| PORTUGAL | 3 | URUGUAY | |
| SINGAPORE | 3 | ||
| TAJIKISTAN | 3 | ||
| UNITED ARAB EMIRATES | 3 | ||
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 | 600 | Budget/Finance | 43 |
| International Relations | 94 | Social | 20 |
| Energy | 67 | International Trade/Economic Development | 19 |
| Education | 65 | Media Relations | 18 |
| Public Safety | 62 | Transportation | 17 |
| Agriculture | 52 | Health | 13 |
| Natural Resources/Water | 49 | Gender | 9 |
| Environment | 43 | ||