Originally from the website http://www.americancatholic.org/ , circa 2009. This table is no longer on their website.

Please be aware that the Internet does not always tell the truth, especially about things Catholic.  For a good, trusted source of information on some of these saints, see https://www.franciscanmedia.org/source/saint-of-the-day or http://www.newadvent.org/cathen/

Cause Saint
Accountants St. Matthew
Actors St. Genesius
Addicts St. Maximilian Mary Kolbe
Advertising St. Bernardine of Siena
African-Americans St. Benedict the African, St. Peter Claver, St. Martin de Porres
AIDS patients St. Peregrine Laziosi
Air travelers St. Joseph of Cupertino
Alcoholics Venerable Matt Talbot, St. Monica
Altar servers St. John Berchmans
Americas Our Lady of Guadalupe, St. Rose of Lima
Anesthetists St. Rene Goupil
Animals St. Francis of Assisi
Archaeologists St. Helen
Architects St. Thomas the Apostle
Argentina Our Lady of Lujan
Art St. Catharine of Bologna
Artists St. Luke, St. Catharine of Bologna, Blessed Fra Angelico
Astronauts St. Joseph of Cupertino
Astronomers St. Dominic
Athletes St. Sebastian
Attorneys St. Thomas More, St. Raymond of Penyafort
Australia Our Lady Help of Christians
Authors St. Francis de Sales
Babies Feast of the Holy Innocents
Bakers St. Elizabeth of Hungary, St. Nicholas
Bankers St. Matthew
Baptism St. John the Baptist
Barbers Sts. Cosmas and Damian, St. Louis of France, St. Martin de Porres
Bee keepers St. Ambrose
Beggars St. Alexis, St. Giles
Belgium St. Joseph
Blacksmiths St. Dunstan
Blind Raphael (Michael, Gabriel and Raphael), St. Lucy
Bodily ills Our Lady of Lourdes
Bohemia St. Wenceslaus
Bookkeepers St. Matthew
Booksellers St. John of God
Boy Scouts St. George
Boys St. John Bosco
Brazil Feast of the Immaculate Conception
Breast disease, against St. Agatha
Brewers St. Luke, St. Augustine of Hippo, St. Nicholas
Bricklayers St. Stephen
Brides St. Nicholas
Broadcasters Gabriel (Michael, Gabriel and Raphael)
Builders St. Barbara, St. Vincent Ferrer
Businessmen St. Homobonus
Businesswomen St. Margaret Clitherow
Butchers St. Anthony the Abbot, St. Luke
Cab drivers St. Fiacre
Canada Sts. Ann and Joachim, St. Joseph
Cancer patients St. Peregrine Laziosi
Carpenters St. Joseph
Catechists St. Charles Borromeo, St. Robert Bellarmine, St. Viator
Catechumens St. Charles Borromeo, St. Robert Bellarmine
Catholic schools St. Thomas Aquinas
Catholic youth St. Aloysius Gonzaga, St. Maria Goretti
Charities St. Vincent de Paul
Childbirth St. Gerard Majella, St. Raymond Nonnatus
Children St. Nicholas
Chile Our Lady of Mount Carmel, St. James the Greater
China St. Joseph
Choirboys St. Dominic Savio
Church St. Joseph
Civil servants St. Thomas More
Clergy St. Gabriel of Our Lady of Sorrows
Colleges St. Thomas Aquinas
Colombia St. Louis Bertrand, St. Peter Claver
Comedians St. Vitus
Communication workers Gabriel (Michael, Gabriel and Raphael)
Computers St. Isidore of Seville
Construction workers St. Thomas the Apostle
Cooks St. Thomas the Apostle, St. Lawrence
Court clerks St. Thomas More
Dairy workers St. Brigid of Kildare
Dancers St. Vitus
Deacons St. Stephen
Deafness St. Francis de Sales
Death St. Joseph, Michael, Gabriel and Raphael
Denmark St. Ansgar, St. Canute
Dentists St. Apollonia
Desperate causes St. Jude (Simon and Jude)
Difficult marriages St. Rita of Cascia
Disabled St. Giles
Disasters St. Genevieve
Doctors St. Luke
Dogs St. Roch
Dominican Republic St. Dominic
Drivers St. Fiacre
Drug addiction St. Maximilian Mary Kolbe
Earaches St. Polycarp
Earthquakes St. Francis Borgia
Ecology St. Francis of Assisi
Ecuador Sacred Heart
Editors St. John Bosco
Engineers St. Patrick, St. Ferdinand III
England St. Augustine of Canterbury, St. George, St. Gregory the Great
Epilepsy St. Dymphna, St. Vitus, St. Willibrord
Europe St. Benedict, St. Bridget, St. Catherine of Siena
Eye disorders St. Clare, St. Lucy
Falsely accused St. Raymond Nonnatus
Farmers St. Isidore the Farmer
Fathers St. Joseph
Firefighters St. Florian, St. John of God
Fishermen St. Andrew, St. Peter (Peter and Paul)
Florists St. Thérèse of Lisieux, St. Rose of Lima, St. Dorothy
Foundry workers St. Agatha
France Our Lady of the Assumption, St. Denis, St. Joan of Arc
Funeral directors St. Joan of Arc
Gambling, compulsive St. Bernardine of Siena
Gardeners St. Adelard, St. Fiacre
Germany St. Boniface, Michael, Gabriel and Raphael, St. Peter Canisius, St. George
Girls St. Agnes, St. Maria Goretti
Grandparents Sts. Ann and Joachim
Gravediggers St. Anthony the Abbot
Greece St. Andrew, St. Nicholas
Greetings St. Valentine
Grocers Michael, Gabriel and Raphael
Grooms St. Louis of France, St. Nicholas
Gypsies Blessed Ceferino Giménez Malla
Hairdressers St. Martin de Porres
Happy death St. Joseph
Headaches St. Teresa of Avila
Heart patients St. John of God
Homeless St. Benedict Joseph Labre
Horses St. Martin of Tours
Hospital administrators St. Frances Xavier Cabrini
Hospitals St. Camillus de Lellis, St. John of God
Hotel keepers St. Amand
Housewives Sts. Ann and Joachim, St. Martha
Hungary St. Gerard, St. Stephen
Hunters St. Hubert, St. Eustachius
Immigrants St. Frances Xavier Cabrini
Impossible causes St. Frances Xavier Cabrini, St. Rita of Cascia
India Our Lady of the Assumption
Infertility St. Rita of Cascia, St. Philomena
Insanity St. Dymphna
Internet St. Isidore of Seville
Invalids St. Roch
Ireland St. Brigid of Kildare, St. Patrick, St. Columba
Italy St. Francis of Assisi, St. Bernardine of Siena, St. Catherine of Siena
Japan St. Francis Xavier, St. Peter Baptist and Companions
Jewelers St. Eligius
Jordan St. John the Baptist
Journalists St. Francis de Sales
Judges St. John of Capistrano
Juvenile delinquents St. Dominic Savio
Kidney disease St. Benedict
Knee problems St. Roch
Laborers St. Isidore the Farmer, St. James the Greater
Latin America St. Rose of Lima
Lawyers St. Thomas More, St. Raymond of Penyafort
Learning St. Ambrose
Librarians St. Jerome
Lithuania St. Casimir
Longevity St. Peter (Peter and Paul)
Loss of parents St. Elizabeth Ann Seton
Lost items St. Anthony of Padua
Lovers St. Valentine
Maids, domestic workers St. Zita of Lucca
Married women St. Monica
Medical technicians St. Albert the Great
Mentally ill St. Dymphna
Merchants St. Francis of Assisi, St. Nicholas
Messengers Gabriel (Michael, Gabriel and Raphael)
Metal workers St. Eligius
Mexico Our Lady of Guadalupe
Midwives St. Raymond Nonnatus
Military members St. Joan of Arc
Miscarriage, prevention of St. Catherine of Sweden
Missionaries St. Francis Xavier, St. Thérèse of Lisieux
Monks St. John the Baptist
Mothers St. Monica
Motorists St. Frances of Rome
Musicians St. Cecilia
Mystics St. John of the Cross
Netherlands St. Willibrord
Neurological diseases St. Dymphna
New Zealand Our Lady Help of Christians
Nicaragua St. James the Greater
Nigeria St. Patrick
North Africa St. Cyprian
North America St. Isaac Jogues, John de Brébeuf and Companions
Norway St. Olaf
Notaries St. Luke, St. Mark
Nuns St. Scholastica, St. Brigid of Kildare
Nurses St. Camillus de Lellis, St. John of God, St. Agatha
Obstetricians St. Raymond Nonnatus
Oceania St. Peter Chanel
Orators St. John Chrysostom
Orphans, abandoned children St. Jerome Emiliani
Painters St. Luke
Paraguay Our Lady of the Assumption
Paralysis St. Osmund
Parenthood St. Rita of Cascia
Parish priests St. John Vianney
Pawnbrokers St. Nicholas
Penitents St. Mary Magdalene
Perfumers St. Mary Magdalene
Peru St. Joseph, St. Rose of Lima
Pharmacists Sts. Cosmas and Damian
Philippines St. Rose of Lima
Philosophers St. Catherine of Alexandria, St. Albert the Great
Physicians St. Luke, Sts. Cosmas and Damian
Pilots St. Joseph of Cupertino, St. Thérèse of Lisieux
Poets St. Columba, St. David of Wales
Poisoning St. Benedict
Poland St. Casimir, St. Florian, St. Stanislaus
Police officers Michael, Gabriel and Raphael
Politicians, public servants St. Thomas More
Poor St. Anthony of Padua, St. Lawrence
Popes St. Peter (Peter and Paul)
Portugal St. George
Postal workers Gabriel (Michael, Gabriel and Raphael)
Preachers St. John Chrysostom
Pregnant women Sts. Ann and Joachim, St. Gerard Majella, St. Margaret, St. Raymond Nonnatus
Priests St. John Vianney
Printers St. Augustine, St. John of God
Prisoners St. Dismas, St. Joseph Cafasso
Prussia St. Joseph Cafasso
Public relations St. Bernardine of Siena
Race relations St. Martin de Porres
Radio Gabriel (Michael, Gabriel and Raphael)
Radiologists Michael, Gabriel and Raphael
Reconciliation St. Vincent Ferrer
Retreats St. Ignatius of Loyola
Rheumatism St. James the Greater
Robbers, danger from St. Leonard of Noblac
Rome St. Peter (Peter and Paul)
Russia St. Andrew, St. Basil the Great, St. Casimir, St. Nicholas, St. Joseph
Sailors St. Elmo, St. Brendan, St. Francis of Paola
Savings St. Anthony Claret
Scholars St. Brigid of Kildare, St. Bede the Venerable
Schoolchildren St. Benedict
Schools St. Thomas Aquinas
Scientists St. Albert the Great
Scotland St. Margaret, St. Andrew
Sculptors St. Claude
Secretaries St. Genesius
Seminarians St. Charles Borromeo
Serbia St. Sava
Servants St. Sava, St. Zita of Lucca
Shepherds St. Marie Bernadette Soubirous, St. Paschal Baylon
Sick St. John of God
Skin diseases St. Anthony the Abbot, St. Anthony the Abbot
Slavic peoples Sts. Cyril and Methodius
Sobriety Venerable Matt Talbot
Social justice St. Joseph, St. Martin de Porres
Social workers St. Louise de Marillac
Soldiers St. George, St. Martin of Tours
South Africa Our Lady of the Assumption
South America St. Rose of Lima
Spain St. James the Greater
Speakers St. John Chrysostom
Stomach disorders Sts. Timothy and Titus
Students St. Catherine of Alexandria, St. Thomas Aquinas
Surgeons Sts. Cosmas and Damian, St. Luke
Sweden St. Bridget of Sweden
Switzerland St. Nicholas von Flue
Tailors St. Homobonus
Tax collectors St. Matthew
Taxi drivers St. Fiacre
Teachers St. Gregory the Great, St. John Baptist de la Salle
Teenagers St. Aloysius Gonzaga, St. Maria Goretti
Telecommunications Gabriel (Michael, Gabriel and Raphael)
Television St. Clare
Theatrical performers St. Genesius
Theologians St. Alphonsus Liguori, St. Augustine of Hippo
Throat ailments St. Blase
Toothache St. Apollonia
Travelers St. Anthony of Padua, St. Nicholas, St. Joseph, Raphael (Michael, Gabriel and Raphael)
Turkey St. John the Apostle
Undertakers Sts. Joseph of Arimathea and Nicodemus
United States Feast of the Immaculate Conception
Universal Church St. Joseph
Universities Blessed Contardo Ferrini
Uruguay Sts. Philip and James
Venereal disease St. Fiacre
Venezuela Our Lady of Coromoto
Veterinarians St. Eligius
Vietnam St. Joseph
Vintners St. Amand
Vocations St. Alphonsus Liguori
Waiters, waitresses St. Martha
Wales St. David of Wales
Weavers St. Anthony Claret
West Indies St. Gertrude
Widows St. Frances of Rome, St. Paula
Wine trade St. Amand, St. Vincent of Saragossa
Women in labor Sts. Ann and Joachim, St. Elmo
Workers St. Joseph
Writers St. Francis de Sales
Youth St. Aloysius Gonzaga, St. Maria Goretti, St. John Bosco