Here are two lists of sociology topics from library classification systems with its call numbers.
From the Library of Congress Classification System
Subclass HM
HM(1)-1281 Sociology
(HM1-299) No longer used
HM435-477 History of sociology. History of sociological theory
HM461-473 Schools of sociology. Schools of social thought
HM481-554 Theory. Method. Relations to other subjects
HM621-656 Culture
HM661-696 Social control
HM701 Social systems
HM706 Social structure
HM711-806 Groups and organizations
HM756-781 Community
HM786-806 Organizational sociology. Organization theory
HM811-821 Deviant behavior. Social deviance
HM826 Social institutions
HM831-901 Social change
HM1001-1281 Social psychology
HM1041-1101 Social perception. Social cognition. Including perception of the self and others, prejudices, stereotype
HM1106-1171 Interpersonal relations. Social behavior
HM1176-1281 Social influence. Social pressure
Subclass HN
HN1-995 Social history and conditions. Social problems. Social reform.
HN30-39 The church and social problems
HN41-46 Community centers. Social centers
HN50-995 By region or country
Subclass HQ
HQ1-2044 The Family. Marriage. Women
HQ12-449 Sexual life
HQ19-30.7 Sexual behavior and attitudes. Sexuality
HQ31-64 Sex instruction and sexual ethics
HQ71-72 Sexual deviations
HQ74-74.2 Bisexuality
HQ75-76.8 Homosexuality. Lesbianism
HQ77-77.2 Transvestism
HQ77.7-77.95 Transexualism
HQ79 Sadism. Masochism. Fetishism, etc.
HQ101-440.7 Prostitution
HQ447 Masturbation
HQ449 Emasculation. Eunuchs, etc.
HQ450-472 Erotica
HQ503-1064 The family. Marriage. Home
HQ750-755.5 Eugenics
HQ755.7-759.92 Parents. Parenthood. Including parent and child, husbands, fathers, wives, mothers
HQ760-767.7 Family size
HQ767.8-792.2 Children. Child development. Including child rearing, child life, play, socialization, children's rights
HQ793-799.2 Youth. Adolescents. Teenagers
HQ799.5-799.9 Young men and women
HQ799.95-799.97 Adulthood
HQ800-800.4 Single people
HQ801-801.83 Man-woman relationships. Courtship. Dating
HQ802 Matrimonial bureaus. Marriage brokerage
HQ802.5 Matrimonial advertisements
HQ803 Temporary marriage. Trial marriage. Companionate marriage
HQ804 Breach of promise
HQ805 Desertion
HQ806 Adultery
HQ811-960.7 Divorce
HQ961-967 Free love
HQ981-996 Polygamy
HQ997 Polyandry
HQ998-999 Illegitimacy. Unmarried mothers
HQ1001-1006 The state and marriage
HQ1051-1057 The church and marriage
HQ1058-1058.5 Widows and widowers. Widowhood
HQ1060-1064 Aged. Gerontology (Social aspects). Retirement
HQ1073-1073.5 Thanatology. Death. Dying
HQ1075-1075.5 Sex role
HQ1088-1090.7 Men
HQ1101-2030.7 Women. Feminism
HQ1871-2030.7 Women's clubs
HQ2035-2039 Life skills. Coping skills. Everyday living skills
HQ2042-2044 Life style
Subclass HS
HS1-3371 Societies: secret, benevolent, etc.
HS101-330.7 Secret societies
HS351-929 Freemasons
HS951-1179 Odd Fellows
HS1201-1350 Knights of Pythias
HS1355 Other societies
HS1501-2460.7 Other societies. By classes
HS1501-1510 Benevolent and "friendly" societies and mutual assessment fraternities
HS1525-1560 Religious societies
HS1601-2265 Race societies
HS2275 Occupation societies
HS2301-2460. Political and "patriotic" societies
HS2501-3371 Clubs. Clubs and societies for special classes Including boys' societies, Boy scouts, girls' societies
Subclass HT
HT51-1595 Communities. Classes. Races
HT51-65 Human settlements. Communities
HT101-395 Urban groups. The city. Urban sociology
HT161-165 Garden cities. "The city beautiful"
HT165.5-169.9 City planning
HT170-178 Urban renewal. Urban redevelopment
HT201-221 City population. Including children in cities, immigration
HT231 Effect of city life
HT251-265 Mental and moral life
HT281 Recreation. Amusements
HT321-325 The city as an economic factor. City promotion
HT330-334 Metropolitan areas
HT351-352 Suburban cities and towns
HT361-384 Urbanization. City and country
HT388 Regional economics. Space in economics
HT390-395 Regional planning
HT401-485 Rural groups. Rural sociology
HT601-1445 Classes
HT621-635 Origin of social classes
HT641-657 Classes arising from birth. Including royalty, nobility, commons
HT675-690 Classes arising from occupation
HT713-725 Caste system
HT731 Freedmen
HT751-815 Serfdom
HT851-1445 Slavery
HT1501-1595 Races. Including race as a social group and race relations in general
Subclass HV
HV1-9960 Social pathology. Social and public welfare. Criminology
HV40-69 Social service. Social work. Charity organization and practice. Including social case work, private and public relief, institutional care, rural social work, work relief
HV85-525 By region or country
HV530 The church and charity
HV541 Women and charity
HV544 Charity fairs, bazaars, etc.
HV544.5 International social work
HV547 Self-help groups
HV551.2-639 Emergency management
HV553-639 Relief in case of disasters
HV560-583 Red Cross. Red Crescent
HV599-639 Special types of disasters
HV640-645 Refugee problems
HV650-670 Life saving
HV675-677 Accidents. Prevention of accidents
HV680-696 Free professional services. Including medical charities
HV697-4959 Protection, assistance and relief
HV697-3024 Special classes
HV697-700.7 Families. Mothers. Widow's pensions
HV701-1420.5 Children
HV835-847 Foundlings
HV873-887 Destitute, neglected, and abandoned children. Street children
HV888-907 Children with disabilities
HV931-941 Fresh-air funds
HV959-1420.5 Orphanages. Orphans
HV1421-1441 Young adults. Youth. Teenagers
HV1442-1448 Women
HV1449 Gay men. Lesbians
HV1450-1494 Aged
HV1551-3024 People with disabilities. Including blind, deaf, people with physical and mental disabilities
HV3025-3174 Special classes. By occupation
HV3025-3163 Mariners
HV3165-3173 Shop women, clerks, etc.
HV3174 Other. By occupation
HV3176-3199 Special classes. By race or ethnic group
HV4005-4013 Immigrants
HV4023-4470.7 Poor in cities. Slums
HV4480-4630 Mendicancy. Vagabondism. Tramps. Homelessness
HV4701-4890.9 Protection of animals. Animal rights. Animal welfare
HV4905-4959 Animal experimentation. Anti-vivisection
HV4961-4995 Degeneration
HV5001-5720.5 Alcoholism. Intemperance. Temperance reform
HV5725-5770 Tobacco habit
HV5800-5840 Drug habits. Drug abuse
From the Dewey Decimal Classification System