Captain America has had a dramatic love life, forming unexpected romantic connections with other superpowered individuals and normal people. In one alternate universe, he had a child with Rogue and started a family with Carol Danvers, who was inhabiting Rogue's body at the time. However, in the comics, Sharon Carter is considered Captain America's one true love, and their enduring relationship has seen Sharon consistently providing support for him.

Captain America has had surprising relationships with fellow Avengers, X-Men, and civilian paramours throughout his long history. While some of his romantic partners are well-known, such as Sharon and Peggy Carter, there are also some unexpected relationships, such as his romance with Rogue in an alternate reality. In a What If...? universe, Captain America and Rogue had a child together, and in another alternate reality, he was in a relationship and had a family with Iron Woman. So, while Captain America may not be known for being mushy-gushy, his love life has certainly been eventful.In Earth-616, Tony Stark is the son of Howard and Maria Stark and becomes an Avenger. In Earth-3940, Howard and Maria have a daughter named Natasha Stark, who marries Captain America and prevents a war. Without the conflict between Iron Man and Captain America, there is no dissension between Marvel's superheroes, changing the outcome drastically.
Blind Al, known for her role in Deadpool, once dated Captain America during World War II. She saw his bravery and strength, but also his vulnerable side.
Connie Ferrari, a defense lawyer, was in a long-term relationship with Steve Rogers, but their union was strained due to her work and Steve's feelings for Sharon Carter. They broke up when Connie discovered Steve's secret identity as Captain America.
Bernice “Bernie” Rosenthal was briefly engaged to Steve Rogers.Becomes Steve's Femme Fatale Love Interest Debuted in Captain America #310 (1985)
Rachel Leighton, aka Diamondback, was a skilled thief and assassin hired to take down Captain America. However, she quickly developed feelings for him and became his ally instead. Their relationship grew romantic, but it was not without its challenges. Diamondback struggled with her criminal past and Cap's sense of duty often conflicted with her ways of doing things. They eventually parted ways, but not before having a child together, who was given up for adoption. 2 Peggy Carter's Niece Sharon Takes Up the Mantle Debuted in Captain America #100 (1968)
Sharon Carter, the niece of Steve's former love interest Peggy Carter, was introduced as a S.H.I.E.L.D. agent who assisted Captain America in his missions. Eventually, she took on the mantle of the superhero known as "Agent 13" and became an official partner to Captain America. They shared a romantic connection, but their relationship was put to the test when Sharon was brainwashed and forced to betray Captain America. She was later killed, or so it seemed at the time, in an explosion caused by the villainous Red Skull. 1 Steve Finds Love Again with Sharon Debuted in Captain America #25 (2007)
After Sharon's supposed death, it was revealed that she was actually being held captive by the villainous Dr. Faustus and was brainwashed into acting against Captain America. Once she was freed from his hold, Sharon and Steve rekindled their relationship. They faced more challenges, including Sharon taking on the role of Director of S.H.I.E.L.D. and Steve temporarily losing his powers, but their love persevered. They ultimately got married and even had a child together, who they named after Steve's fallen friend, James Buchanan "Bucky" Barnes.First appearing in Captain America #310 (1985), Diamondback started out as a mercenary who opposed Captain America. However, in an unexpected turn of events, she developed romantic feelings for him when they first clashed during an attempt on M.O.D.O.K's life. Despite their initial hostile encounter, Diamondback and Captain America went on to assist each other in various missions and even dated briefly. Sadly, their relationship ended when Diamondback killed Snapdragon and believed that Steve would never forgive her.
In Tales of Suspense #77 (1966), Peggy Carter met Steve Rogers as she was tasked with supervising his transformation into Captain America. The two became fond of each other, but their romance was cut short when Peggy was captured and left with amnesia after being struck by an artillery shell. Captain America searched for her until he disappeared himself, leaving their relationship unresolved.
Sharon Carter, who first appeared in Tales of Suspense #75 (1965), is another love interest of Captain America. She is also Peggy Carter's niece, but despite their familial connection, Sharon and Steve's bond was stronger. Their relationship was tested when Sharon was brainwashed by the villainous Red Skull, leading to complications that took a while for them to overcome.Sharon Carter, the relative of a fellow love interest of Captain America, is the niece of Peggy Carter. Both Sharon and Peggy have served with S.H.I.E.L.D and share a common love interest. Sharon met Steve Rogers during her missions with the organization when he rescued her, and they later fell in love. However, their relationship faced challenges as Captain America believed Sharon's missions were too dangerous and wanted her to step down. Despite this, Sharon remained steadfast in her support for Steve. When Captain America was framed for killing Thunderbolt Ross, Sharon re-formed the Daughters of Liberty and worked tirelessly to clear his name. Their enduring relationship has made her the strongest of all Captain America's love interests.