S
- Sahrawi Arab Democratic Republic: حرية ديمقراطية وحدة (Ḥurrīya Dīmuqrāṭīya Waḥda) (Arabic, Liberty, Democracy, Unity)
- Saint Helena: Loyal and unshakeable
- Saint Kitts and Nevis: Country Above Self
- Saint Lucia: The land, the people, the light
- Saint Vincent and the Grenadines: Pax et justitia (Latin, Peace and justice)
- Sakha Republic: Республика Саха; Саха Республиката (Russian, Sakha, Sakha Republic)
- Samoa: Fa'avae i le Atua Samoa (Samoan, God be the Foundation of Samoa)
- San Marino: Libertas (Latin, Liberty)
- São Tomé and Príncipe: Unidade, Disciplina, Trabalho (Portuguese, "Unity, Discipline, Work")
- Kingdom of Sarawak: Dum Spiro, Spero (Latin, "While I breathe, I hope")
- Saudi Arabia: لا إله إلا الله محمد رسول الله (Lā ʾilāha illā l-Lāh; Muḥammadu r-rasūlu l-Lāh) (Arabic, "There is no God other than God and Muhammad is His Prophet")
- Scotland: In My Defens God Me Defend (Often shown abbreviated as IN DEFENS) and Nemo Me Impune Lacessit (Latin, No-one provokes me with impunity)
- Senegal: Un peuple, un but, une foi (French, One people, one goal, one faith)
- Serbia: Само слога србина спасава (Samo Sloga srbina spasava) (Serbian: Only Unity Saves the Serbs) (unofficial)
- Seychelles: Finis coronat opus (Latin, The end crowns the work)
- Sierra Leone: Unity, freedom, justice
- Sikkim: "Kham-sum-ongdu" (Tibetan, Conqueror of the three worlds)
- Singapore: Majulah Singapura (Malay, Onward Singapore)
- Sint Maarten: Semper pro grediens (Latin, Always progressing)
- Slovak Republic: Verní sebe, svorne napred! (Slovak), Faithful to ourselves, together ahead! (1939–1945)
- Slovenia: No official motto.
- Solomon Islands: To lead is to serve
- South Africa: !ke e: /xarra //ke (/Xam, Diverse people unite or Unity in Diversity)
- Union of South Africa: Ex Unitate Vires (Latin, From Unity, Strength)
- South Georgia and the South Sandwich Islands: Leo terram propriam protegat (Latin: "Let the lion protect his own land")
- South Sudan: Justice, Liberty, Prosperity
- Soviet Union: Пролетарии всех стран, соединяйтесь! (Russian, Proletarians of all countries, unite!) (Also translated into the languages of the other fourteen republics)
- Spain: Plus Ultra (Latin, Further beyond)
- Former: Una, grande y libre (Spanish, One, great and free, during Francisco Franco's dictatorship)
- Sri Lanka: No official motto.
- Sudan: النصر لنا (An-Naṣr Linā): Arabic, Victory is Ours)
- Surinam: Justitia, pietas, fides (Latin, Justice, piety, loyalty)
- Swaziland: Siyinqaba (Swati, We are the fortress)
- Sweden: royal motto: För Sverige - i tiden (Swedish, For Sweden - With the Times) (See all royal mottos)
- Switzerland: Unus pro omnibus, omnes pro uno (Latin, One for all, all for one.)
- Syria: وحدة ، حرية ، اشتراكية (Waḥdah, Ḥurrīyah, Ishtirākīyah) (Arabic, Unity, Freedom, Socialism) Ba'ath Party
Read more about this topic: List Of National Mottos