Ambassadors
The following is a list of ambassadors.

Andoria (pre-Federation) 
 Ambassador to first Babel Conference
 Thoris (to Earth)

Tellar (pre-Federation)

Vulcan (pre-Federation) 
 Solkar (to Earth)
 Soval (to Earth)
 V'Lar (to Mazar)

United Federation of Planets 
  (ambassador-at-large)
  (ambassador-at-large)
  (to Andoria, 2169 – 2175)
  (to the Klingon Empire)
  (to Eminiar VII)
 Gav
  (to Mordan IV)
 K'Ehleyr (to the Klingon Empire)
 Krajensky
 Lojal
 Neelix (ambassador-at-large between the United Federation of Planets and the Delta Quadrant) 
 Odan (to the two moons of Peliar Zel)
 
  (to Nimbus III)
 Sarek
 Shras
 Spock (special envoy to Qo'noS, 2293, later unofficial secret envoy to Romulus)
 Taxco
  (to Romulan Star Empire)
 
 Vadosia
 Worf (to the Klingon Empire, 2376 – 2379)

Klingon Empire 
 
 Kor (to )
 Korrd (to Nimbus III)
 Klingon Ambassador (to the Federation)

Romulan Star Empire 
Caithlin Dar (to Nimbus III)
Nanclus (to the Federation)
Pardek (to Khitomer)

Other 
 Briam (Krios to Valt Minor)
 Byleth (Iyaaran to Federation)
 E'Tyshra (T'Lani III)
 Falow (Wadi to Federation)
 Hodin ( to Federation)
 Kollos (Medusan to Federation)
 Loquel (Iyaaran to Federation)
 Mauric ( to Federation)
 O'Zaal (co-coordinator of the Antarian Trans-stellar Rally)
 Petri (Troyius to Elas)
 Riva (Ramatis III)
 Sharat (Kellerun)
 Treen (Kradin)
 Voval (Iyaaran to Federation)

Unnamed ambassadors 
 Catullan ambassador
 Coridanite ambassador
 Minicoy ambassador
 Tholian ambassador (known to Benjamin Sisko)
 Tholian ambassador (to Romulus)

Alternate timeline / alternate reality ambassadors 
 Alexander Rozhenko (to Klingon Empire)
 Jean-Luc Picard (to Romulan Empire)
 

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Ambassadors, List of