CSS Level 1 lists 53 properties.

• Font Properites
  • font-family
  • font-style
  • font-variant
  • font-weight
  • font-size
  • font
• Color and Background Properties
  • color
  • background-color
  • background-image
  • background-repeat
  • background-attachment
  • background-position
  • background
• Text Properties
  • word-spacing
  • letter-spacing
  • text-decoration
  • vertical-align
  • text-transform
  • text-align
  • text-indent
  • line-height
• Box Properties
  • margin-top
  • margin-right
  • margin-bottom
  • margin-left
  • margin
  • padding-top
  • padding-right
  • padding-bottom
  • padding-left
  • padding
  • border-top-width
  • border-right-width
  • border-bottom-width
  • border-left-width
  • border-width
  • border-color
  • border-style
  • border-top
  • border-right
  • border-bottom
  • border-left
  • border
  • width
  • height
  • float
  • clear
  • display
• Classification Properties
  • white-space
  • list-style-type
  • list-style-image
  • list-style-position
  • list-style

CSS Level 2.1 lists 115 properties.

• azimuth
• background
• background-attachment
• background-color
• background-image
• background-position
• background-repeat
• border
• border-bottom
• border-bottom-color
• border-bottom-style
• border-bottom-width
• border-collapse
• border-color
• border-left
• border-left-color
• border-left-style
• border-left-width
• border-right
• border-right-color
• border-right-style
• border-right-width
• border-spacing
• border-style
• border-top
• border-top-color
• border-top-style
• border-top-width
• border-width
• bottom
• caption-side
• clear
• clip
• color
• content
• counter-increment
• counter-reset
• cue
• cue-after
• cue-before
• cursor
• direction
• display
• elevation
• empty-cells
• float
• font
• font-family
• font-size
• font-style
• font-variant
• font-weight
• height
• left
• letter-spacing
• line-height
• list-style
• list-style-image

• list-style-position
• list-style-type
• margin
• margin-bottom
• margin-left
• margin-right
• margin-top
• max-height
• max-width
• min-height
• min-width
• orphans
• outline
• outline-color
• outline-style
• outline-width
• overflow
• padding
• padding-bottom
• padding-left
• padding-right
• padding-top
• page-break-after
• page-break-before
• page-break-inside
• pause
• pause-after
• pause-before
• pitch
• pitch-range
• play-during
• position
• quotes
• richness
• right
• speak
• speak-header
• speak-numeral
• speak-punctuation
• speech-rate
• stress
• table-layout
• text-align
• text-decoration
• text-indent
• text-transform
• top
• unicode-bidi
• vertical-align
• visibility
• voice-family
• volume
• white-space
• widows
• width
• word-spacing
• z-index

CSS Level 3 has several hundred properties.
See MDN CSS reference index of properties.